For me is the First Predator the most atmospheric and thrilling part. It is a masterpiece of moviemaking for me. But I also have to say, it works best, if you see it the first time. You dont know what's going on and what that creature is.
But the predator movie that I have seen most, is Predator 2. I think that movie expands the predators best. It works for me as an action movie with some humor very well and I also love the style of it. LA is the best summer heat hot spot for predators to hunt. I love the first shootout against these crazy drug gang. There is also this aztecig gang style, that gives the city this jungle touch. And I also loved Danny Glover how he handles his job with a trunk full of weapons.
I also like Predators, but this movie is for me too much a turn back to the original one. I think, that movie would have been worked much better on an strange Riddik like planet. I miss the big there-is-no-way-out feeling in that movie.