Theirs always talk about whats on meta, off meta and whats the best kit to use for peak unga efficiency. But whats your favorite loadouts that you don't see as often, less so what is most gamey and what you find the most fun personally (albeit alot of players probably find being most effective the most fun). The more creative and unique the better.
Heres some of mine
Buck Suey: M37 shotgun (Buckshot, Gyro, Magnet,) + Machete. Hold both of them akimbo, run with light armor and be a speedy resin clearing assault trooper. Follow up your buck stuns with machete chops for cool, scenic finishers. You will probably die a lot at first but with good footwork and backup its a very fun playstyle and you look like a total badass (or a complete fool).
Boombox man: Literally just run around with a box of grenades, be the dedicated unga bomberman. Focus on stunned or wounded xenos to get those sweet gib finishers and be the madman you always were deep down. Have a magnet shotty or something available on backup.