Can Paper Mario & Luigi's battles really be considered QTE's? Cause if they are they're the only ones I've ever enjoyed.

based on what evidence besides your besides opinion? 

QTE's generally involve things that aren't in the games main gameplay. Where traditionally cutscenes would have been instead. You're saying that QTE's have never been implemented for my reasons. And are always implemented to  give satisfaction to the player by successfully performing a very simple task, despite many gamers complaining that many QTE's in certain games are a complete pain in the ass to do correctly.

I'm not a fan of QTE's, but there are uses for them that are better than their alternative (too many scenes with no user input in a story driven game).

Sorry, but that argument holds no water whatsoever.

The CONCEPT of so-called "Quick Time Events" is ironic, because the name implies that somehow it is either quickening the gameplay, or adding to it. It does neither. It gets in the way, and makes things needlessly complicated, or in some cases even dumbed down. I would prefer to PLAY a game, and solve a puzzle, and beat a boss on my own, etc., than to have the game tell me when to hit a button, give me a smal window to do it or I fail, etc.

It's just lazy gameplay design. Your implication that some people wouldn't mind it if it were in games exclusive to their console, is kind of pointless. It may be true for some, but I think by and large, a lot of gamers would rather just play the damn game.

I love GoW QTE's... I always finish the bad monsters using QTE instead of just kill them (I can't be good with my enemies).

 Said that... the Ryse QTEs seems weird (and what I read means nothing because the result is always the same even if you don't push any button).

Nothing makes them enjoyable.

Bolded: You do know what the word subjective means, right? Besides, the post was obviously rather sarcastic in nature.

But to answer to your post, Quick Time Events are usually a solution for game mechanics where there is no intuitive controller move that would work for the desired event. Like cinematic finishing moves of bosses or mini bosses. It is a solution to allow you to interact with this scenes instead of only making you watch them with the benefit of a possible reward if you pull them off.

of course they should never come out of nowhere, be the main gameplay mechanic or punish you unfairly if you miss them, but if they are implemented the right way, they can very well enhance gameplay.

I remembered the best QTE ever created... how amazing was to push the buttons to make this happen.

 The best L3 + R3 push EVARRRRRRRR!

I hate QTEs.

I enjoy GOW QTEs, because those are the rewards of the fight you already fought; the fight is not fought by QTEs. It is fought with actual gameplay, you need to dodge, attack be aware of your surroundings; use the enemies at your advantage, etc.

So, you get a visceral finisher against the boss, or monster in a cinematic way, as a reward of how badas$ you are XD. And they are very hard to miss since the position of the button in the screen reflects which button you need to press; so it is not frustrating at all.

I'm sorry, but I just personaly don't buy that at all. I don't think QTE type stuff "enhances" anything. And developers using it, as you say, because they can't figure out how to make that kind of thing work for the gamer to pull it off manually, to me that's just laziness, plain and simple. If their games are so great, and their gaming engines so advanced, and if they're such good developers, they should be able to figure out how to make gameplay more complex (or even simpler) as it needs to be, in real time within the game action. Instead of dumbing it all down by hitting the breaks and making people go through the motions pressing ____ button, holding ____ direction, in sequence, etc. 

To ME, and apparently to a lot of gamers, that's just boring.