I receive more memoir than anything else--perhaps more than everything else combined. But it is difficult to place and requires more effort than other genres, so I'm very picky.
When sending me a memoir, please bear in mind that I only take on memoir when I feel I absolutely must--when the idea that someone else could represent it makes me hugely jealous. Memoir is harder to sell than general nonfiction and extra work to represent, because of the necessity of editing the full manuscript, so I'm very conservative. I often reject things that I imagine the right agent could sell. (Indeed, I've hated many successful published memoirs...but most that I have loved have also been very successful, which is why I have confidence in my judgment.) If I reject your memoir, it's only because I'm confident that I'm not the right agent for your project.
I tend to be interested in relationships, conflict, characters developing, American experiences. I like accessible writing--nothing fancy, but nothing clunky. I often like memoirs about illness, memoirs that use something concrete and external as the occasion for their discussions of character (such as a hobby or a game or a pet or a trip). It's very cool to make me laugh, to use an unusual structure to good effect, and/or teach me something about life--but not by overt didacticism and usually not by giving facts. I like memoir for what an insightful and talented writer can bring to processing her own experiences.
Some memoir subgenres that I tend not to like:
Substance Abuse Memoirs
Memoir About Family Experiences
All this said, if you do secure my representation for your memoir, you'll have the benefit of having an agent who is devoted to the genre. Most of my reading for pleasure is memoir, and I'm very passionate about the ones I love, including those in my stable and those that aren't.