Paladin has got to be the most nonsensical of all the N7s. Or at the very least, he's sharing this dubious glory with Fury. He's a better engineer than both quarians(at least if we're talking the ability to produce tech combos, since he can produce all kind of tech combos by himself, which none of the quarians can, at least without appropriate ammo)... and he's a sentinel. Much like Fury, he has powers that make no sense on him... ED was salarian trademark(and before QMR bites my head away, we're talking MP only here) before he came along and I think AIU is the only other kit with SF. He has a pretty vanilla power(Incinerate) to trigger both of them... he just doesn't make a lick of sense!
Despite all of it, he's also my favourite N7. It's ever so much fun to troll phantoms and hunters by chilling them through the wall and them exploding them in storm of icy particles when they walk around the corner. I love trolling atlases and banshees by planting down my shield and absorbing their attacks... or simply returning it to them
Boinking the goon with a fire shield and then exploding him with a followed SF... never gets old. And I really like his armor and voice... only the destroyer sounds more macho than paladin does.
Plus, he's an easy mode. Whatever you do, something is almost guaranteed to explode and I really like that!
The only attribute that QFE has over the paladin is her ass and honestly... I never really cared for jiggly bum-bums. More of an asari kind of guy myself.