It all depends. I usually buy good games or games I know I will play for quite some time and enjoy it.
I download them though, PC games only for a variety of reason. One being to see if my computer can handle the game if a developer did not release a demo. I will also download when I'm sort of interested in the game but will never play it for full price. So I justify it for myself that a devs game is either unplayed and not-payed for (therefore losing exposure) or play it and then only stift him out of some money.
Some games I bought legally afterwards though because after playing the pirated version I decided that it's good enough to have an official version.
The Doctor will see you now
Promoting Lesbianism --> 
