My favourite predators are the original, & a very close second is the predator from pred 2. Both of those preds were obviously experienced hunters, & in my opinion were by far the best. They're overall designs were excellent, & really have that "predator" style to them. Most serious pred fans would know what I'm talking about. The AVP preds simply didn't have that unique predator style, which was a major letdown.
As far as the newer preds go, I prefer celtic, he has been the best of the predators we have seen recently, much tougher & hardier than scar or chopper, & a much better fighter in my opinion. He didn't back down from any fight, & for that, he at least deserves some acknowledgement & respect.