By and large I tend to follow writers nowadays rather than characters. And usually I think writers produce their best work when "doing their own thing" rather than when they are writing a big brand name, and some DC or Marvel editor is telling them something like "No...you can't do that because...". Loads of examples, I guess we can all think of...but one that springs to mind is Greg Rucka on "Queen and Country", where I think Greg did wonderful work.
But on other hand, there are a handful of authors where I strongly prefer their mainstream DC or Marvel work to their more "independent" work. Maybe it's just because I don't like the themes they deal with in their independent work. Or maybe some writers actually respond to having their imagination channelled by some "external" discipline?
Examples, for me include Jonathan Hickman, where I enjoyed his Fantastic Four/ Future Foundation run more than any of his more independent stuff I've read so far, and (probably one nobody else will agree with), Brian Vaughan where I strongly prefer Runaways to stuff like Y, the Last Man, and Ex Machina.
Anybody agree with me that some writers actually produce their best work in a franchise?? (And although I've kept my own comments to comics, I'd be interested if anybody who read prose franchises such as Star War, Warhammer, etc...if any writers shine there. I haven't commented myself purely because I've not read any prose franchises myself.)