I've backed 28.
A few different things catch my eye really. I like to support other fine artist campaigns because I like supporting the arts generally and I know other artists helped fund me at low levels. As a gamer, I do back some gaming stuff rather impulsively! And comic book things too. Just because of the nature of things I like it tends to be smaller companies or individual makers/artists/writers.
I'm less keen on gadgets and technology. Mainly because I really really have to need the product to be convinced.
Some of my backing is based on my own campaigns. I like to give back and try to give about 5% of my own fundraising to other projects.