Not that I meant for it to happen, but I've found that my small fleet of five bikes has divided itself into two fiefdoms: my three 700c bikes and my two 20" folding bikes. I find myself riding bikes out of one group or another for weeks or even months at a time, and each time I decommission one group and commission the other, it's like we've just met for the first time. It's a strange and weird feeling, but it's also wonderful and keeps things interesting, despite them having been the same bikes for years.