Well I first started out using @aim years ago.. when i was young. after learning more about other services i relized that @aim sucks or @aol either one. then moved onto @hotmail. i liked @hotmail for a year or so. then moved onto @gmail. i am currently using my @gmail and @hotmail. either one of those would be good.
I use yahoo.com because i'm registered everywhere with yahoo, but i think gmail is better (at design,spam protection, services).
I really like @hotmail.com. Just like it Anyway it depends of name availability. and hotmail address also becomes your msn ID
gmail plus the whole iGoogle thing. It's the beginning of the end of Microsoft for most desktop applications and any relevence to the web at all.