There are still way too many styles that I haven't brewed yet for me to totally rein things in, but I've also been trying to standardize my lineup over the past year. Basically, I want to have a house recipe for each style of beer that I like.
I'm not trying to knock it down to 5 styles, but when I want a porter, I want to be able to open up my brewlog to that page and go for it, without having to recalculate all the mineral additions, etc. Also, I'm not designing my own recipes yet, but making small tweaks to some proven recipes.
This year I'm scaling back to 3-gallon batches, which should help me brew more often and make refinements. I've done two 3-gallon batches so far with the new gear, and it's been a lot of fun. Really not much different than 5, but it just seems more manageable.