I really dislike the word "cheery". To me it suggests a kind of senseless, inane forced jollity. So I'm never that.
mm - so you've just dissed any innocent soul who says yes ? - you should have defined your terms as my old government teachers used to tell me.
Personally I think it's pretty hard not to feel pretty good when cycling - in that way I think it is actually - consistently - better than sex.
Have made some of my best decisions/had some of my best insights on a bike - as my mind floats free.
I believe there is a certain quote from Einstein on the matter, though I can't claim that my mind works at that level.
(yep - I too don't like forced jollity - often seems to be papering over severe personality cracks - but I don't have that on a bike. And thought you were talking about something else. I have even been known to wave at folks approaching on a bike. Of course northerners are more friendly/cheery on bikes - especially when crossing the Humber Bridge)