I am genuinely surprised that you like this movie. I will have to try and watch it again, but I found it fairly painful first time around. I am with goose regarding the CGI assassin. This franchise has been kept alive by (mostly) Wonderful suit work so far, the CGI Predator was an abomination. AVP:R isn't good by any stretch, but I didn't find it completely agonising. Although I think I only ever watched that at the cinema when it first came out. Maybe I'll give both another go. AVP is just fine, it has enough enjoyable moments to counter the worse bits for me.
I think after the original 2, Predators is by far the best of the rest, in a different league even for me. But a lot of people don't seem to like that one...