I always seem to be addicted to one thing or another...Such has been the pattern since I was a young girl. Most of the addictions I had were having to do with video games and other electronics.
Anime (which led to japanese pop and rock)
If you count Pokemon and/or Sailor Moon, then I first watched it before I was in kindergarten (I remember watching Pokemon with a preschool friend of mine). I think I was the most aggressive about watching anime during 6th and 7th grade; I kept watching in 8th grade, though not nearly as much. And after going into high school I haven't had as much time for it. But I still managed to get some in here and there.
Pokemon games (which led to other video games)
Started when a friend introduced me to them around 2nd grade or so. I was obsessed up until about 8th grade, where I lost interest for a while, but had a few phases of readdiction to an older Pokemon game, LeafGreen. (Unfortunately, I have since fallen off the bandwagon and I am no longer actively keeping up with Pokemon. All I know is that Black and White are supposed to come out soon, and that there's some dude called N with green hair who seems to be popular.)
First played it in 1st grade, made account but never got rich and kept forgetting the password. Finally stuck to one account and worked very hard on it. I did accomplish a lot, but now I don't think it was worth the time because I no longer do much on Neopets (got too busy in high school and didn't finish the most recent plot). Probably not going to pick it up seriously again, but who knows?
Nutrinopets (which led to role-playing and graphics)
Actually was bored by the site at first, but returned some months later and decided to become more active. I was invited to a club, and that's how I discovered the forums of the site. It used to be quite active, but I saw people leave and move on with their lives as time went on. The site went down when I was in 8th grade and it's not here anymore. It's through Nutrinopets that I discovered role-playing, graphics, and my obsession with big numbers, particularly when it comes to forum posts (I had well over 20,000 forum posts, though sadly it's all gone to waste, but I'm glad that I no longer have the obligation to visit the site).
Another forum; I think I was addicted to this before I got into Nutrinopets, actually, but I didn't stay on Gaia nearly as long. I think that's how my childhood innocence got spoiled. Got my first taste of seeing lots of swearing and more inappropriate stuff. -_-;; Mostly I just liked to make money and get items for my avatar. My account got deactivated because I was too young, and I had trouble getting it back once I did turn 13. I still go to Gaia sometimes, but it's really not that interesting to me. :\
The Sims 2 and 3
I really enjoy things that I can customize and control at my will, so making virtual people achieve things was pleasing to me... (If only it were that easy in real life to become a master chef, buy a huge house, or be friends with with 30 people... Though the third one's already too much work in video games XD)
Originally joined the site because they had an anime episode that I was having trouble finding elsewhere on the Internet. Abandoned my account for a long time before a friend of mine encouraged me to become active on the site. I don't have a very positive view of the site anymore (though I haven't completely quit because I'm too attached to it D: ). There's really a lot of people there, though, as well as many talented graphics-makers.
DeviantArt (which led to PHOTOGRAPHY!)
Another site that I was inactive on at first, but later became a frequent visitor. I started out only posting graphics, but then I decided to put up a few of my old vacation photos, and eventually photography became the main focus of my gallery. I'm grateful to DeviantArt because I probably wouldn't have been inspired to get into photography without it.
Youtube/Vocaloids/Nico Nico singers
A friend of mine suggested some Vocaloid songs to listen to (I believe Magnet was one of them; I forget the rest. But Magnet was the one that stood out to me; although it's not my favorite song, I know more of its lyrics than any other Vocaloid song). I knew about Vocaloids from seeing the artwork (particularly on Zerochan.net) and I'd listened to one or two songs of the Vocaloids before, but I guess those songs weren't very good since I hadn't liked Vocaloids back then. I'd thought they were too robotic-sounding and that I preferred "real" Japanese singers. Then I was made aware that there are actually members of the site Nico Nico Douga who make covers of the Vocaloid songs: basically, they sing the Vocaloid songs themselves and put it up on the Internet. They're quite talented and some have actually become professional singers. (Just see Pico, he's even got his own Vocaloid based off of himself now!) Well, you already saw my Valshe spam. I'll probably post more videos of the Nico Nico singers' music in the future.
I've had a bunch of other mini-addictions as well, to series such as Angelic Layer, Sola, Ouran High School Host Club, Pretear, Skip Beat, Durarara!!...and to video game franchises like Harvest Moon, Super Smash Bros...I wonder, will I ever break free from this cycle?
I can already feel myself being sucked into it again. I've seen two websites for the Dollars. It's a fictional group from the series Durarara!! but people have taken it upon themselves to make an actual site. There's a Dollars forum and a Dollars BBS. (If you don't know the password to get in, just ask me or whoever else you know that's a Durarara!! fan) You may realize that many of the sites I frequented in the past were sites with active forums. I've always preferred forums to chatting (chatting is too fast-paced, a bit harder to multitask), and I can't help but be attracted when I see a forum that might suit an otaku like myself.
I probably won't join the Dollars, at least not yet, because of the amount of users (not quite enough...it seems like the size is like Nutrinopets was when it was waning in activity, and I don't really want a repeat of the past). There is another prospective that looks very good to me, Vocaloid Otaku. It's a forum focused on Vocaloids and it's more active than the Dollars forum...If I join, though, I'm bound to get addicted and waste even more time on the Internet, which really is not in my best interests. It's so tempting, though! It would give me an excuse to make graphics (I could make myself an avatar with a matching signature banner). And making new accounts is always interesting for me. I'll hold back for now.