I am in the same boat as the OP. I have probably 10-12 rideable and at least half a dozen frames, wheelsets, components, etc. It's too much. These don't include my girlfriend's or her kids bikes that I store and maintain.
I need to get my addiction under control! I think half a dozen is plenty +/- one or two.
Maybe when I'm retired I'll increase the number of my fleet but it's a lot right now lol.