I read a lot of blogs, possibly too many blogs, but clearly I like 'em.
These are some of my favourites for all round good stuff:

Lil Blue Boo
Pancakes and French Fries
no big dill
Raising Colorado
Oh Joy!
Design Scouting
A Beautiful Mess

And these are the other ones, just as good - just different:

Tom & Lorenzo - brilliant. Fashion and TV served up with a critical eye.
The Gloss - fab. Opinions and info on all sorts.
The History Blog - kind of does exactly what it sounds like...