I don’t mind games with lengthy tutorials, actually. Usually those games have complex systems and lots of moving parts, and I crave the tutorial to help me wrap my head around things.

I also don’t mind a bit of a preamble establishing the characters, the mythology, and the stakes of a game that has a substantial narrative component. All within reason of course. If I’m spending hours watching a game instead of playing it, something has gone wrong.

Roxas is so much better than Sora. I wish I could play him all the game

Let me guess. You didn't play Chain of Memories before KH2 right?

You are definitely not alone. I feel this in my soul. It's especially brutal for those of us with limited time. I just want to play the game, not watch a movie.

It's really a question of whether you want to play a game once or play it later again.
If a game is 100+ hours, I'm pretty certainly done with it finishing once.
50+ hours, unlikely to ever play again.
30-40 hours, maybe with some cheating.
So many of my favorite games are in 10-20 hours size (or even less) because those are the games I've played several times, if after many years.

Totally agree. The onboarding in modern games is ridiculous. If game mechanics require hours of tutorials, you're doing it wrong. I understand that some games are just like that, but in this case, spread the tutorials across the game and don't pile it up at the very beginning, otherwise it's a chore. A good example would be Doom Eternal, where you're being gradually introduced to new mechanics, which are relatively short and simple.

In the end, I just want to play a game, and not to have a second job!

Depends on the game, you can have with tutorials or longer intro's but I remember I quit Okami the first time because felt long, and then picked it up again because I had nothing else to play and I loved it. Still one of my top favorites. Yakuza franchise was one I forgave them for it because their is a lot of fun in each of them but I am kind of done for now....Some cutscenes are so long, even when they are sometimes amazingly done.

No, I haven't. Portable games don't count, everybody knows that. Also, I'm not sure how it could make the intro of KH2 unboring.

If you had played Chain of Memories before KH2, you would probably have been pretty excited to finally meet and know more about that one mysterious character that showed up at the end of CoM for a few seconds in Twilight Town with zero explanation.

If you go to KH2 without knowing about his existance, you will just be annoyed and bored for the entire thing because "no Sora, who this, this sucks".

Same.  I didn't even make it though the tutorial.  I had something else I wanted to do and dropped the game for the time being.  That franchise in particular is the type I would boot up for 20 minutes of play (unless I'm on a more epic battle) knock out a map or 2 and play something else.  I didn't mind the story portion despite none of it being new information.  It fleshed out a bit we only heard a little about.