the movie wasnt really good, the biggest criticism i had of the first one was that a lot of the fight scenese between the predator and the aliens (not the queen) were not filmed well at all: the camera was either too close or it was shaking/jerking all over the place its hard to keep track of what was going on; this was something they did not correct in the second movie;
*SPOILER ALERT!!!*
also, it seems kinda silly that the guy can get impaled through the chest/stomach area with the tail of an alien (the girth of hte tail grows bigger as it is nearer the body) and can still move around relatively well (he walked to the helicopter) and managed to get a couple accurate pistol shots off the alien; in real life, his organs would've fallen out and he would've died from blood loss or whatever; last but not least, their helicopter outran a nuclear explosion...seriously
*END SPOILER ALERT*