I didn't start cycling again to lose weight, but almost everybody I see tells me I am 'looking good' or 'I have lost weight'. Does the ego no end of good!
For me, I think it is as much to do with the fact that 'the pub' used to be a bit of a hobby! Now, if if I go to the pub on an evening I take it really steady, and I would rather spend the day/evening cycling rather than go to the pub.
Still have a pint or three on occasion though.