I am an 'everything' scrapper....
I typically stay to one kit (truth be told it's mostly because I don't want to risk forgetting a kit when I go to give credits in the gallery).... but I get so inspired by seeing pages that others have posted when they mix and mash, so I have really been making an effort to try and mix things up more.
I like both doing my own thing and working with templates. I find when I have lost my scrappy mojo, I have the best time getting it back by just doing my own thing..... but then when I do get my mojo back I want to get as much done as I possibly can while I'm feeling scrappy so I tend to just back to templates for help.
and Lastly, I like both messy and clean pages, however, I like not having to be overly fussy with keeping things tidy so I like getting messy..... I can't resist a good stash of scribbles and if a kit includes paint splatters I'm definitely gonna use em.