Most of the boards I came across were full of pictures of celebrities or supermodels in tight suits and awkward poses. While I have nothing against celebrities, I don't think a hundred pictures of Sebastian Stan give you good inspiration for a character. Here's why: it makes you focus on the what not the who.
So I decided to make my own. You can visit my character inspirations board on Pinterest, if you like. It's founded on the idea that the best kind of character inspirations are pictures of interesting people in interesting circumstances or settings.
Here's an example: