In order:
1) Scout - I love double jumps and the speed of the scout
weapons: scatter, bonk(now that is doesn't suck), normal bat(sandman is still buggy)
2) Solly - I love rocket jumping
weapons: old school rocket, bunboats, equializer (sad about the damage drop they did)
3) Engy - lvl 1 ninja sentury all the way (in arena that is), then pistol charge into the frey wrenching anybody I can get close enough to.
weapons: lvl 1 sentry, dispencer in base, pistol @ wrench charge the front line
4) Pyro - Compression Blast is the only way to fry
weapons: old school flame for CB, flare, axetinquisher