Should I get Little Big Planet or Killzone 2 for Christmas?

Both. :D
 
I personally thought Killzone 2 while very nice to look at wasn't that great, the story was bleh the characters were bleh and the campaign was super short.
 
And I have yet to play LBP mainly because I don't see the charm I like watching videos of people making neat levels but none of it has any substance.

Well they're completely different so that depends on your taste.

I vote for LBP. It's so charming and cute and the level maker and online user made levels extend the life of the game way beyond that of most other games today. Killzone 2 was good, but the main draw and fun in it is the multiplayer, which gets old after a while.

I vote Little Big Planet.  I had more fun with it then Killzone 2.

I would go with LBP. Killzone's big selling point is the visuals. They are impressive at first but the bland pallete and repetitive locations will wear on you. The gameplay always felt a bit wonky to me. The cover stuff was iffy at best and I had to fiddle with the sensitivity endlessly in order to get some approximation of COD-style. The less said about the story or "characters" the better. LBP has a lot of charm and will probably be a welcome change from the big blockbuster games you've most likely been playing.

Right, thanks guys. I'm probably going to go with Little Big Planet. 
@septim said:

"... will probably be a welcome change from the big blockbuster games you've most likely been playing. "  

LittleBigPlanet seems more fitting. It will keep you smiling through the holiday. Maybe they'll put back up the downloadable santa costume to make things even more festive.

LBP really fits the season.  Just played some good new user levels just last night.

" @Aaox: I got bored of Killzone 2 after about a week.  The online is really gewd, but not really better than any other shooter.    LBP is sick if you have friends (or a girlfriend) to play with, especially after Monday's Patch.  If not, it's still fine, but get some friends to play with :)  "

Killzone 2 is not fun at all.

Killzone 2. Got bored of LBP real fast.

 リトルビッグプラネット  
 
/ツレド  

As long as you're not playing with dicks it's alright, by dicks I mean random ones and not friends.  When friends dick around with you it's okay but it sucks a lot online cause people kill you on purpose and shit. 
 
God damn I hate dicks on LBP. 
 
Bunch of bitches and whores.

Honestly, I'm not sure I'd go either way.  Killzone 2 is okay but it's just another FPS.  If you've already played Modern Warfare 2, don't bother going back for Killzone 2.  If there is a plus to the game however it's that the campaign is a decent length.  About as long as any of the Halos or longer than either Resistance.  My experience with LBP was admittedly limited.  Frankly I got bored with the game quickly.  I never spent much time searching around for the best fan-made levels, so maybe there is something in that.  All I know is that I was terribly disappointed in the game.   If I had to choose though, I'd pick LBP because maybe you'd find more value in it than I have.  Killzone 2 is just Killzone 2...played one FPS made in the last 5 years, played this one already, too.

These are two completely different games, so it all depends on whether you're into shooters or platformers. I think that if you really like making & creating levels (and you have four controllers & three other friends who'll hang with you), LittleBigPlanet is definitely worth your time, plus you'll get a ton of replay value from the game.
 
But..Killzone 2 is one of my favorite games this year. Yes it's "just a shooter", but IMO it's the most satisfying (and best looking) shooter I've played in years. The multiplayer is addictive has hell. I just think I'm enamored with this game because I really don't like any of the Call of Duty titles. But if you're looking for a solid shooter for the PS3, you honestly can't go wrong with Killzone.

Little Big Planet if you are the creative type who wants to try and make platforming levels. Killzone 2 if you like shooting dudes in the face.

Little Big Planet. The creativity is what appeals me to that game. Multiplayer is pretty awesome too.

" @InfiniteGeass: Why get Killzone 2 if you got MW2?  Dude you can frickin' kill people in an airport and laugh about it like the Joker.  LittleBigPlanet, you can make penises and simulate sex.  hehe. "

LBP, nuff said

both. Killzone 2 is a great online shooter and LBP is endless fun when you have friends. while I don't play Killzone 2 online as much as I should, i really enjoy it when I do. 

I go for Killzone 2 since i love online FPS.

LBP is far superior to KZ2.

Having played a LOT of both, they are both awesome, however LBP makes me happy, so i'd go for that. However (ASIDE FROM THE STORY) Killzone 2 is still great, and different enough from other shooters that it's worth at least a look.