BUMP!
I about never found this old thread, but it got me to thinking with recent talks about some people liking turtleneck sweaters, and some people not being able to stand sweaters at all (and thinking back on some people saying they can't stand when bedsheets touch their teeth), I think this thread deserves a good bumping.
So anyway, for my main strange habit, is that I'm slightly manic, particularly in my routines: I have all kinds of different routines all throughout the year, routines for just about every month, usually regarding things I may watch like on DVD, VHS or YouTube (the latter of which will be difficult now that a vast majority of my favorite videos have been wiped out this year); books, magazines, comic books, fanfics, other things I may read; MP3s or CDs I may listen to; what I wear depending on the weather; even what kind of cereal I eat in the morning. And these routines have to be exactly the same every year, they must never be changed, though some routines may be added with passing years, and some may be dropped altogether, depending on what it is.