Yes, sometimes I feel like I have too many wishlists! But it helps when we're picking out items to go through the different lists. And then I have one that's called "Things to Buy First." That one is all over the place, but only has the stuff we're dying to get.
I have 15 separate wishlists, but there's a ton of overlap between them. I have a list of things I'm considering in my next order and one for things I just generally really want but might not be able to get right away. All of those (and everything else) are also broken down into separate lists by what type of product it is.