yester64: i would like to know if you rather buy games on sale or full price.
Sales mostly, except when I am extra happy of some game appearing on GOG, like Outlast, Assassin's Creed, some of the Telltale games, probably the future The Witcher 3 and Cyberpunk 2077, etc. Albeit I am not sure if Outlast actually had some promo sale right away when it appeared on GOG...
But the thing is, I sometimes feel, especially with indie games, that the default price is inflated because the developer/publisher doesn't really expect most people to buy it at full price anyway, but wait for sales. So the discount price is actually the price they expect most people to pay for it.
If they don't feel that way, then they always have the option of not putting their game on discount, ever. I think it worked quite a long time for many Codemasters games on GOG, or Minecraft (not on GOG), or Diablo 2 + LOD, or the way how Interplay hiked up the default price of the old RPGs (possibly so that they could sell them more often in promos).
Oh and those 50-80€ new games... I very rarely have an urge to buy some game on release day (unless I specifically want to support something by buying it on release), because I most probably wouldn't start playing right then. I don't recall when was the last time that I'd buy a game and start properly playing it right away, beside just trying the game out.
So no, I wasn't one of those waiting the whole night outside a store to get a copy of GTA V. Heck, I was still playing GTA San Andreas at that point! I'll buy GTA V maybe in 2018 (the PC version, if available).
That's also why I personally don't mind it that much if e.g. Banner Saga appears a bit later on GOG than it did on Steam. As long as it comes here too.