This is a question born of curiosity, as I think that it's really just up to the individual artist and there's certainly no right or wrong... I got to thinking (highly dangerous, I know)...I've heard so many artists suggest the use of large brushes, the larger the better, in order to not get bogged down with details (among other reasons, I'm sure). But I find that I hate large brushes. In order for my work to look like I want it, I constantly find myself using a) my number 4 filbert and b) my number two round (except for blocking things in, of course). I hardly *ever* use anything bigger than a half inch for anything at all.
So, what do y'all use?
P.S. And option four is for people like Larry S.