If a game is part of an established franchise that I already enjoy I will usually pre-order a game.
If a game has a good demo, I might consider it, but more often than not I will wait for reviews/ a sale.
If a game has just trailers, I will probably avoid pre-ordering it and I will wait for reviews/ a sale.
I will say however, that pre-order bonuses do affect my orders, mostly because I am somewhat of a completionist, and I have this weird desire to get everything in a game.
If a game has a good demo, I might consider it, but more often than not I will wait for reviews/ a sale.
If a game has just trailers, I will probably avoid pre-ordering it and I will wait for reviews/ a sale.
I will say however, that pre-order bonuses do affect my orders, mostly because I am somewhat of a completionist, and I have this weird desire to get everything in a game.