You won't, I forget which one it is, but you can get back default somewhere, I've definitely played with those several times and always got back to default.
IMHO, the default is the nicest looking.
The others all seem to be quite dated colour configurations. Good if you live in the past, or you're running on an unusual configuration, I guess.
DT
[EDIT] Yeah, it's the last one, VS 2010. You're right, it never actually shows a tickmark.