Well that's just it. It's been nearly 20 years since I played anything. I don't know what I like. I do know I like the y axis reversed though.
Try the Division and see what you think.
Team Fortress is a team-based twitchy shooter based around the old Counterstrike system, you might give that a poke. Learning curve is steep though.
Battlefield series is good, goes from foot units to controlling tanks, AAVs, jets, helos, and the newest ones also have a "commander" who can assign objectives and call bigger air strikes.
ARMA is a straight up milsim developed by Bohemia, a Czech outfit. Similar to America's Army in that it started as a training simulator to be used by various militaries. Very CPU-heavy, I can barely run ARMA III, but the mod scene is insane. Zombie mods, survival mods, etc. Vehicle play too.
COD franchise has branched, but they're mostly the same? Meh.
Oh and the most recent Fallout is more of an FPSRPG, similar to the STALKER series or Metro 2033, instead of being an RPG with a decent shooting mechanic.