I've made a whole new set of friends since I bought a bike. 2 weeks ago I had afternoon tea in a posh frock at Kensington Palace Orangery with a group of fabulous ladies I met through here. Not a bike in sight that day. And I'm off to Wensleydale in a couple of weeks on a Wallace & Grommit style cheese holiday. Mr LPH does not share my love of cheese but another Orger does.
I will almost certainly agree with all the other reasons posted up here, but when on impulse I took my bike test to use up some carried over annual leave and blow my Christmas bonus on something fun in January 2008 I never expected owning a bike would have such a positive effect on my social life.