Two main choices
For general shooting, standard crosshairs/duplex (they are virtually all duplex nowdays), and for big game shooting at shorter ranges (wooded country mostly) I still favor the post.
The post is easy to see under nearly all conditions, and is fast, like the front sight (without having to line up the front and rear sights), and accurate enough to bring home the venison or anything else you might want to eat. The only place a good post reticle doesn't shine is target, (small) varmint, and very long range shooting. I look for posts whenever I go to a gun show, and once even bought a rifle just to get the scope (4x post) on it.
Completely personal preference, but if I am hunting game where I might need to take a snap shot, if my rifle has a scope on it, it will have a post in it.