I practically only ever read memoirs and autobiogs. Here are some I've enjoyed off top of my head:
Life Interrupted - written by a bloke who had tourettes - funny, moving, insightful
I'm reading Girls Of Tender Age at the moment by Mary-Ann Tirone Smith - about a murder that happened to her childhood friend, very well written.
Dibs, In Search of Self by Virginia M. Axline - written by a therapist and her sessions with a disturbed boy. Amazing stuff. Boy turns out to be super brainy.
I read Richard Bransons one some years ago, did enjoy it. Some people think he is a bit of an arrogant twat but I liked the book, quite inspiring.
Boy Georges book - great fun, sex drugs and rock 'n' roll type stuff.
Be My Baby by Ronnie Spector - singer from motown days who was married to total nutcase music producer Phil Spector.
Dreamgirl & Supreme Faith; My Life as a Supreme by Mary Wilson. Lots of insight as to what a bitch Diana Ross was/is!
If you liked A Man Named Dave (and I presume you've read A boy Called IT and The Lost Years by same author) you'll like Unloved by Peter Roche.
Girl, Interuppted is also brill - don't know if you've seen film but it's about a girl living in a psycho ward in the 60's.
Personally I loved Russel Brands booky wook but I love the strange chap anyway.
I read Autobiographies and Memoirs rather than biographies - which tend to be too factual without the emotion and usually quite boring, like a history lesson.