I believe that what you turn into as an Animagus
reflects your personality - the best example, perhaps, being Wormtail
(Peter Pettigrew). He turned into a rat, and look at how he turned
out. He betrayed his best friends, Lily and James Potter, by selling
them to Voldemort. Sirius turns into a dog, which reflects his slightly
gruff, very caring, loyal nature. James Potter turned into a stag,
but I don't know anything about that. McGonagall can make herself
a cat, which are clever and cunning like her. Rita Skeeter, the
Daily Prophet reporter, turned into a beetle so that she could "bug"
people for information for her tabloid-like articles.
JKR has stated that Harry will not become
an Animagus, but she never said anything about Ron or Hermione.
If they become Animagi, what will they become? My theories:
Hermione: Well, we know that Hermione is
kind and extremely clever
so maybe she could be a cat
perhaps a wise old owl?
Ron: Ron's got all those brothers to compete
with, so maybe he'd be something that really stands out
no idea what, though. (Caroline