DISCLAIMER: Someone else owns just about anything I might write about. If it isn't owned by a large corporation, there is probably a small corporation that does. Sucks to be me, dunnit?
I am one of those people who read a lot, and whatever snippets I write remains in my notebooks. I have loads of ideas, but can't seem to either put them in words or finish the ones I have put in words.
I tend to read Ranma ½, Naruto, Harry Potter, Stargate: SG-1, Buffy, and loads of crossovers between different canon series.
I tend to like when the good guys win, and when the bad guys get their true reward. (Death, preferably through agonizing last moments.)
Of my favourite authors on ffnet, frequenters of Rorschach's Blot's yahoo group are most prevalent.
I do not read blatant yaoiification of straight characters. I think yaoiification is silly, and mpregs are just stupid. If anyone who reads this are offended by that: Get a life.
I think the authors of above-mentioned series has either ruined the series or left so much out that fanfiction has become needed to fill in the gaps. Bakamoto turned a promising start into a Dragonball rip-off, JK seems to celebrate the fact that no good deed goes unpunished and if you are mean and spiteful and a bully, you can do whatever you want, in Buffy they seem to like necrophilia, Stargate had so much potential that they wasted away with the whole Ori thingy - it would have been interesting to look back onto planets they visited early on in the series.
I recently begun reading and watching Rosario + Vampire, and was pleasantly surprised. I don't usually like vampires. At all.
My favorites among real manga/anime tends to revolve around comedies. Azumanga Daioh and Full Metal Panic: Fumoffu are my all time favorites. When it comes to regular TV-series, I tend to watch Science-Fiction series. I like Fred Perry's Gold Digger, et les schtroumpfs. I have too many booky favorites to count, but most prevalent among those are Terry Pratchett's Discworld series. Pure gold. (In the English version, not the American.)