Let's see here ...
1. Ability for gunner on hog to nade -- maybe regulate it like say have to press a button, wait a couple seconds for the weapon to be put on 'safe', then you can rotate around like on gun but fire nades
. Then going back to gun, there would be the standard 3-4 second pause when reloading.
2. Horns on the hogs
3. Headlights and taillights on/off with 'Q' button (or whatever you have set for the light when on foot) - handy to annoy enemies (flash your lights at 'em) or maybe to signal team!
4. A weapon like the Redeemer from Unreal Tournament
- a guided rocket which creates a massive explosion upon impact!
5. Explosive rounds for the pistol - got the idea from a mod of Blood Gulch I played with Dreper ( I think?), though those were rocket-like explosions. What I mean is somewhere between pistol-shot damage and rocket damage but you still have to be as accurate as with the pistol
6. SMOKE GRENADES! Need I say more?
7. Anti-Gravity boots like in Unreal Tournament - they wear off just like invisibility and overshields, but allows the wearer to jump high and 'float' per se
8. Again from Unreal Tournament (
), portable teleporters - you switch to them like a weapon, aim, and fire a disc whatever distance you want ... then if you fire again, you'll teleport to the spot it landed (unless it's destroyed by an enemy, in which case you'll be tele-fragged!)
9. Secondary fire on the Ghosts, maybe like a fuel rod cannon blast
10. Longsword fighters in PC!
11. Ability to nade when you have the flag in CTF! How handy would that be?? Hold the flag with one hand, nade with the other!
I'm sure I'll think of more ...