I have a key bound to Dispenser just for Scout and Heavy, and I have a frying pan for that reason. I have a full demopan outfit, with strange targe and all. I have mastered Pootis-POW!, and wish I had a strange Holiday Punch, and my Strange Family Business has over 650 kills.
I feel bad about trolling with Medic, but if the team I'm on is seriously rolling, I'll demand a Spy to uber. I still have never ubered a Scout, but I rarely find one that's both good enough to uber and not already on the other side of the map.
If I'm a Spy, it means you have a lot of bad Snipers. And I will be having a very good time. (This is especially true for KOTH maps)
Though I think the biggest thing is that I never do nothing. Even if I'm needin' a dispenser from an Engineer, no Spy is touching my Engy. I can't just walk around, I need to click on people.