You have to shoot what feels right to you. I shoot both ways, I typically on my practice sessions will shoot 5 arrows at a time, 3 using sights an 2 canting my bow and shooting with out them. I have to change my anchor point when doing this but I can usually put the instinctively shot arrows within 4 inches of the others. The great thing about shooting without sights is the lack of pin confusion in a hunting situation. And while shooting targets I dont feel like I have to blow the nock off the previous arrow when shooting without sights.

Hope this helps

Rogue