The price compared to the perceived amount of enjoyment i will get from the game. The genre, replayability and length of play are all important. Won't lie having the name of a developer that I have had good experiences with is normally enough to swing my decision from maybe to buy.

Enjoyment simple really.

I am motivated to buy games when they offer me great value, challenge, depth, and immersion. A game that the emotive narrative is well crafted, the game world rewards exploration, and the game mechanics, system, and interactions reward the player for going the extra mile to gather extra resources, max a obscure skill, or develop a superior grasp of the mechanics.

What motivates me for buying a game, that´s a good question. Mostly a good Story for the Single Player mode, the genre of the game doesn't matter. And it should have a good Multiplayer. But too be honest, if the game cost too much I'm not going to buy it  , my budget doesn't allow me that, that's why i aim for older games, since they are cheaper, and mostly better done, with lower graphics.

Story playability and replayability

Replayability, tons of action, and multiplayer options. I'm a sucker for a good fantasy slasher too.

I think and consider to buy a game for his stuning graphics, history and the price of course!!

I research games before buying so good reviews is a plus.

I love a game with a lot of replay value. I'm also into games that have a good feel of control but I do not like games that give so much freedom that you get lost trying to figure out what you're supposed to do next. Also the game must be able to run on my computer.