I disliked the game to start with. And I still dislike a lot about it, but I did like the boss battles. The main thing that irritated me the most was I felt I had been suckered into playing another Prey or Quake 4 or Doom 3(ie, they're all pretty much the same damn game). And that feeling stayed with me. I thought the boss battles were fun, despite being a bit corny with the whole 'vulnerable spot highlighted for dummies' thing going on. I liked a some of the weapons, a few of them were quite satisfying, in particular the line gun and the razor(buzzsaw thingy) and the assault rifle, despite looking like an oversized, elongated, baked bean can was useful right to the end. I think the fun started when I went to replay with stuff unlocked and suddenly the monsters weren't so irritating because I had enough ammo to deal with them and wasn't always fiddling around trying to shoot those tentacles off those 'mutated baby dog things with tentacles that shoot stuff at you'(I hate these guys). I also disliked the ones with no legs, because they were harded to hit with the razor, and that was about all I ever had ammo for

.
My other bone of contention is how you handle in the game. I mean ok, so FPS twitching around is unrealistic, and I get it, he's in a big heavy suit. But seriously I'm sure an aircraft carrier has better turning and handling than Isaac Clarke and his magical wondersuit.
As an aside, I did like the upgrading aspect of things, it added an rpg element, without the bothersome rpg experience points. That said, I didn't really get the point of having 'gaps' in the node network that didn't actually do anything except give you access to other adjoining nodes. If it had given anything, even a tiny fractionable improvement I would have been a bit happier about spending those power nodes.
All that said, by the time I had the gear to deal with the whatever space zombies(which might has well have just been bloody Aliens(tm) for all the difference I think it would have made to the game), I was having more fun, because I could waste a spare round of line rack ammo to destroy those black and orange(ie, retextured and stat boosted) versions of the basic monsters. Oh and those mutated stasis pack thingies, was it just me or did all that twitching look more like a glitch than a slavering monster?
Anyway, I liked the Lvl 6 armour, I thought it wuz cool

but couldn't be stuffed going through again despite having mah gunz out
