It's non RPG mechanics are reminiscent of Uncharted/Gears/Killswitch. Theres a big difference, but everyone to their taste I guess.

But I could classify Gears in the shooter category. There is a greater difference between Halo and Killzone 2 than between Gears and most FPSs

Deus Ex all the way. Well, with System Shock 2 right behind it, with STALKER riding it's coattails.

Borderlands is fun but nowhere near that level.

Fallout 3 is also very good, and perhaps it's because it was too sandbox, but it just didn't manage anything like the central narrative Deus Ex or System Shock 2 had.

I suppose Bioshock was okay too, but for me it was way to light on the RPG and was basically an attempt to keep the feel of System Shock 2 but make it way more accessible and FPS orientated. They did a pretty decent job, but I felt it lost just a little too much from the RPG side.

They've made it an FPS?  I kid, but clearly it's not eligible due to its TPS vs FPS nature.

Why is there a distinction between TPSs and FPS, as I have said, they are as great divides within the FPS genre

Because a TPS is seen from third person view, looking towards/behind or around the main character. This creates a totally different experience. FPS lets you become the character in vision as well as action. Gears lets you switch between the two points of view in battle for added effect. Mass Effect doesn't let you do what Gears does in that respect. 

Deus Ex, easily. Best game of all time, imo.

Bioshock is a straight FPS with some customization, not a hybrid.

As for Fallout 3, it's not a hybrid because the shooter mechanics are almost unexistant. There is pretty much no twitch gameplay, and reflexes/hand-eye coordination are not needed. Headshots will not do more damage, and the AI is so pitiful that they're like sitting ducks.

Yah, I guess that's what I was trying to say.  I wish there were more full on FPS/RPG hybrids as I actually really like them, but they always seem to end up more praised that bought, which I guess gives developers pause.

The third-person view allows you to be more aware of your surroundings and possess a sense of positioning, which is better for games where either the environment comes into play as a necessity, and/or there is too much going on in the surroundings while still having time to respond to the situations. Gears of War is a decent example because you do have that cover system which would be weird if it weren't in third-person view. World of Warcraft is a great example too because you need to have a great sense of positioning due to the area-of-effect spells and other stuff.

The first-person view is better for more focused twitch gameplay or just immersion, which is why most shooters are FP.