Well, for me, it depends on the topic. If I’m thinking of something to code, I usually think in problems. Sounds weird, but mostly I know where the problems are before they appear, except for syntactical ones, they drive me nuts. There is as well an instant idea of how the code would look like, as I’m thinking of the problem.
When thinking of some art stuff, I usually think in color or music (not that often, because I’m not that creative on music, mostly).
On thinking about daily things, I think in problems too, sometimes in english (weird for me, since I’m from germany,… can’t really control it). I had it even today, where I couldn’t remember a german phrase of “no system at all” (connected to guys, trying to flirt). Had to tell in english.
My dreams are colored and with music too, wouldn’t be fun, if it weren’t.
But anyway, I personally think you will not find that much people here, who have text dreams or none at all, at least because there are many creative people around here. In my opinion, it depends on how sensitive/trained your apperception is. Basically, the human brain works with pictures (as I’ve heared somewhere), you will not remember something, you have written, if you can’t see it. The picture and the close look onto it while writing makes hand written notes that effective, I think. Thats by the way a big problem with KI, I think, because robots aren’t able to get even half of the information out of a picture, a human can.