currently i plan on using project nevada and companion willow

any other ideas how to make the game more enjoyable
quest companions and other things as well armor wep and such

Depends on your system, and if you have dlcs.

New vegas restored -- Rips down the cell transitions for the strip. Also adds in some buildings.
Sierra madre on the strip. -- Sierra madre is now open for business, on the strip. All sorts of cool things
IWS -- More things to shoot.
Monster Mod -- Lots of different creatures to meet, and kill. (Not at all lore friendly, but it can spice up your game)
Caliber -- A wee bit of work you will have to do to get all everything working properly, but its worth it. New pretty weapons, ammo re-worked.
Eve -- energy weapon mod, currently in a beta, its linked on this forum. Or if your waiting on the next patch, it will appear on nexus for public release on July 11th.
Ghost Variants -- Starcraft ghost armor. Very pretty.
A world of pain -- Lots of new locations with people to kill.
glow sticks -- If you run a weather mod that makes the nights dark, having glow sticks is fun. Or if your in a maze like building having something to drop to mark your passage is nice.
powered power armor -- If you plan on using power armor this adds a real feeling of using advanced tech. Having to maintain your armors power, or looking for sweet upgrades can be fun.