It was a great game, but it never beats AvP2 heres my reasons why.
AvP2
+Rich Multiplayer Community STILL
+Plenty of weapons for each faction
+Character statistics
+Come on, Alien Lifecycle was amazing
+Amazing Multiplayer Maps
-Servers are shut down...
-I lost my CD key, therefor I can't play online...
-Exosuits were great but overpowered...
AvP3
+Great Graphics
+The violence is fantastic (thats somewhat morbid)
+Good level design
+Fun Campaign
-5 weapons each faction? Really...
-Garbage picking...
-No community
-What was it 8 maps?
-No statistics, it's not fun being an incredibly fragile Praetorian
-WTF!? You can't be pred alien!
-No Alien Lifecycle mode
That seems VERY one-sided but thats the truth.