Unless it's the best game ever, the original Deus Ex, it takes a bit to get going.

Depends really. I think 1 hour is good to get for a action/fighting game, but for an RPG I would say a minimum of 3 - 5 hours would be good. If you're reviewing a game though I think it's only fair to put a minimum or 10 hours into the game.

Sometimes it is, sometimes isn't and in some cases you don't actually even need to play the game at all to make accurate conclusion.

Honestly if Im not enjoying myself 1hour into playing something..... usually I wont even 10 hours lateron.

Its enough if its a shooter or a battle arena game. An RPG, adventure or action game requiere a lot more.

Usually that's enough. There's some games that take a long time to really get the hang of.

Try learning some of those Paradox Interactive grand strategy games in under an hour lol

If its an RPG, in one hour I'm barely out of the tutorials.

It should. Hook me up at the beginning, not after I've suffered with a boring 10 hours.

Persona 4 must really suck if we jugde it by the first hour or three.

Eh. In some cases, the first hour doesn't really represent well how the rest of the game is. For instance, the first hour level of Ratchet & Clank: Into the Nexus isn't all that much like the rest of the game imo.