At what point do you lose/gain interest in a game based on review scores?

[Rogerioandrade]

I actually never consider reviews when choosing which game to buy.
I prefer to watch gameplay videos and check the game´s website to see if it catches my interest.
There are some games that got generally average or poor reviews that I tried and had lots of fun, like Doctor Lautrec (3ds) and ZombiU (WiiU), while some high-acclaimed games like GTA and CoD are not interesting to me at all.