I built up 3 frankenbikes last year. I moved so I could no longer walk to work and so I built up a pair of commuters from frames and parts I had lying around. I also finally got around to building up a gravel bike from a 1993 Bridgestone XO-2 frame. I'd been reading a lot about gravel bikes and decided I wanted one. I have more fun building up frankenbikes than pretty much anything else. I like starting with something I need and then looking around for a bike that can do the job.