So I've been playing Ballistic Overkill for a while. Shit's a real fuckin' treat. Fast, brutal, low TTK. 7 very flexible classes with diverse selection of guns and perks for wildly different playstyles. You know, actual depth to the gameplay. I'm looking at you, Overwatch!
Basically, it's a team-focused class-based... Quake. If that sounds fun, make sure to give it a try.
P.S. Oh btw I've played a few hours of Overwatch recently. It's horrible.