I honestly enjoyed AvP more than AvP:R. AvP:R had a lot of potential but it all fell short. The lighting was absurdly dark, there were some things that were unnecessary, like the skinned man in the woods. Some of the sound effects were weak. Almost all of the CGI was done terribly. The acting was atrocious. The whole plot was just somehow odd. It wasn't paced very well and almost seemed a little random at times. The fight scenes were too short and felt a little useless. And speaking of useless, every character in the movie felt totally useless to me. Every single person could have died and not affected me at all. There was no connection at all. The only character in the movie that I enjoyed was Dallas, and that was mostly for a few funny lines.
Now for AvP. The lighting was actually good, the whole pyramid thing played with the idea of ancient astronauts so I kinda liked that. On that note the pyramid itself made little sense. It had a huge generator that mankind just decided to not try and replicate, plasmacasters locked away for really no explainable reason other than to create a plot device. And something else odd. Ok the Predators came there every 100 years to hunt and whatnot. Well they needed sacrifices. There have not been any natural inhabitants of Antarctica for a very, very long time. If ever. So whether or not the pyramid starts up is pointless since there's no one there except for during this movie. Also since the Predators detonated their bomb the pyramid really shouldn't even be there. So pyramid hole aside, lets continue. The CGI in this movie was pretty decent. Not the best but not bad. The predator face design was very bad. The rest of their design was pretty good. The aliens looked pretty good. The Queen looked amazing albeit a little large. The acting wasn't that bad. It wasn't the best but it wasn't awful. I personally didn't mind the Scar/Lex teamup. Predators are a logical race, and logic in that situation says you'll need all the help you can get. And if you have help you might as well have them capable of surviving an alien attack so he made a shield and spear for her.
So all in all I have to side with AvP.