Genre: Romance (I don’t mind romantic subplots, but pure romance is just not my cup of tea) or long humor fics, which I’ve found don’t hold my attention past a few chapters. Short or oneshot humor I’m okay with.General Pairings: Under no circumstances will I beta any fic containing erotic rape, or rape-as-love. I also won’t do incest, and I hold this rule for adoptive relationships as well as biological ones. I don't like intergenerational pairings, but since I'm aware that aging rates can vary depending on species, here's a general guide - if it would result in jail time and sex offender status in real life, one of the characters is literally old enough to be the other's father or mother, or one character took any part in raising the other, I won't do the pairing. In addition, I like to stick with pairings that are physically possible - if you have to ask, you should probably look for someone else.
Next Gen: I'd rather stick with characters that are fairly well-developed in canon, so I'd rather not do stories centered around fringe characters or canon characters' children or descendents. I might make exceptions for DBZ on this count, though.
DBZ general: I'm not too fond of Goku-centric stories; I thought he got too much attention in canon as is.
DBZ pairings: The idea of Piccolo romantically involved with anyone is kind of enough to make my brain short-circuit, so no Piccolo romances, please. I'm also not too fond of Goku/Bulma; though I won't go so far as to say this is a deal-breaker, I've always seen them as having more of a brother/sister type relationship, so if you want me to consider this pairing, you're really going to have to sell it to me. Other than that, I'm good with anything that meets my general pairing conditions as listed above.
A:tLA: NO SHIPPING FICS. This is non-negotiable.
Other: No character-bashing or hatefics. Mpreg really grosses me out. I'm not too fond of Mary Sues either - once again, if you have to ask, you should probably look for someone else.
Other than that, while I'll consider beta editing crossovers, keep in mind that if I'm not familiar with one of the fandoms I won't be able to do as good a job as I would like. I'll have to have at least a passing familiarity with all of the fandoms involved in order to accept the story.