Annoying roomie stories!? Gladly!
My dorm roomie was from my home town and we got along rather well. Throughout the first semester, like everyone, I met new people and began to hangout with them. He was originally from the college-town's area and had plenty of people to hang out with, but he had/has some major separation issues (along with some body issues and he is a hypocrite, but we won't even go there). I began to be out nightly and would invite him to local music events, but he would decline to his msn and myspace (it was bigger at the time than facebook ... if that puts a date on me I dunno what does). After a while, he just wouldn't talk from me not being around. We didn't speak more than 6 months after the end of the second semester when I moved out of the dorms supposedly due to one bizarre thing. He ruled the roost as I was gone most of the time, but the fridge was mine. Having the dorm to himself meant I wouldn't complain about having 6 inches of clothing on the floor at any given time. So, in my leaving I removed his items from the fridge and as there was no counter space, I set a gallon of milk on the floor. Apparently I placed said milk onto one of his favorite shirts ... that was mashed on the floor with his entire wardrobe... we rarely talk.
So, I found a cheap hole in a shady part of town and lived there for several years during which time I had 3 roomies before getting outta that place.
My first roomie was heavily religious as his parents sheltered him greatly. His emotional distress having been in college for so long and not changing his lifestyle from a 13 yr old's was massive. I had many talks ending in him feeling like religion and his squeaky-clean lifestyle needed an overhaul. He's now in a happy relationship after going through several drastic wardrobe changes from WWE wrestler fashion to Roger on RENT (partially my girlfriend and my fault ... oops) to cowboy to plaid to urban cowboy to biker ... like motorcycles. (he rides a pedal bike)
My second roomie was a straight WoW fanatic. He needed nothing but saltines and water, but $15 needed to go to WoW every month. He didn't really do much more than that ... really it's a good thing that he set his computer up in the living room or I'd've never seen him. Best roomie I had except for my girlfriend now, she feeds me

.
My third roomie from the shady apartment was my second roomie's older brother. He was slightly more eccentric as he too is a graphic designer/illustrator. His greatest flaw was his lack of drive to accomplish something. He'd get to a certain point and give up for long spans of time. He did this with things like challenging video games to the dishes, the latter of which was the biggest problem for me as mold is unpleasant. But really, when it's your turn to start the dishes as I did them the last five weeks in a row, yeah I'll clean my stuff, you get ill from mold on your dishes.
Well, I suppose I've never straight complained about all of my roomies like that all in one big push. Feels good.