Botting
Vult MK III with 2 neut Mk II for light weapons
Hog TD with Plasma Dev for heavy weapons

Mining
Centaur

All others
Maud Type X with various configs

On infiniboost
Any ship can infiniboost with any battery, it is just a matter of how fast you want to go. I bet you can make an alias that makes it easier, but I never tried.

Perhaps it would be a good idea to let the throttle control turbo output as well?

Bots: Valkyrie (any class) Tri-N3
Duel/PvP: Orion Centurion Rev C - Single gauss (I'd love to use A valk for this... if it didn't spell doom)
CtC Offense: Valkyrie Rune - Tri-N3
CtC Defense: Valkyrie Vigilant/Rune - Tri-N3
Mining: Centaur (any class... does it matter?)
Trading: TPG Maurader Type B (don't have trade9 for X)
Queen Hunting: Ragnarok Mk3 - 2x Chaos Swarm, 3x Gemini

Skycommand. Period.

Maybe MkII for trading.