I decide what I'm gonna use based on where and how I plan to hunt, now having said that I take adjustable sticks with the swivel head at least 75 % of the time. I learned how much of a pain in the butt a bipod can be, getting caught up in yucca plants, snow, uneven ground, etc. With sticks you can kick them out of the way in that situation and not blow every chance you have. Also when you get a burner coming in at a sharp angle you can throw the sticks aside and swing faster and get on target.
I do think having a bottom rail mounted on your gun with QD bipod would be handy but I have not had a chance to try that as of yet.
I debated between sticks and a bipod all night before a deer hunt this weekend, I settled on the bipod and considering how the hunt worked out I am Very glad I did. I geuss if you can't tell I'm a bit of a fence rider on this one, they both have their pros and cons but overall I feel like sticks offer more versatility than bipod in most calling situations.