No other game offers the same level of realism that INF+EAS offers. Some come close but fall short. The free-aim, iron sights, and animation do it for me. The movement needs to be improved, but no game comes close to matching its realism. I like games that set up a strict, but simple set of rules and then do whatever you want within those rules. Like INF vs CS, Chess vs Checkers, and Tribes 2 vs um... something.
CS tries to control ever action the player performs. The player cannot shoot more acurately than x. The player must have this kind of loadout arrengment. The player must get more kills to get better weapons. And so on.
Checkers: The player must move forward with each move. The player must take any possible captures. and so on.
In Tribes 2, you have a rule set tha is pretty broad. Each player can pretty much do whatever. You arn't limited to a class system, and like INF, you can pick whatever loadout you want. Further, you can build up fortifications, sensor networks, you can spy on the enemy. The vehicles themselves only have a coupleo attributes to govern them and from there the player can do whatever.
What I like are games that don't have a ton of BS to limit the player artificially. INF has some BS (Prone and SAW) but on the whole it has far less than most other games.