When you get a new game do you go in blind, or do you look up the achievements/tropies before hand so you know what to shoot for?  
 
I go in knowing them, writing them in a book actually, to cross off as I do them. I try and just glance over story related ones to save from spoilers.  
 
Am I nuts?

When the achievement system was new I really enjoyed printing out the achievements before I played so I could go for the S-Rank. As time went on that grew less and less fascinating to me, so now I usually go in blind and just get what I get.
 
As an OCD-styled completionist I still end up gettting a lot of them.

I'll take a peak at the ones that are listed, and I'll go for Platinum if they seem reasonably achievable. If they are all secret then I will play around witht he game a bit before looking any of them up.
 
I only have 3 Platinum trophies, though I would have all of the R2 trophies if they didn't want me to get 10,000 kills in deathmatch (I seriously got all the other ones, man do I feel screwed over by that).

I usually glance at them to make sure none will be missed from just going through the main story of a game. Once the story is done, then I will keep playing to get achievements that you have to go out of your way for.

I don't really care about achievements (Hence my rather low Gamer Score). If I get them whilst playing them that's great but I don't generally actively seek to get them.

Usually go in blind.

I go in blind to begin with then as i keep playing i look at them

i look em up before i play, i like to know how challenging it will be to get them

The spoilers are the worst part. But I'm stuck in the middle.  
 
The completionist in me wants to get the S-Rank, but the lazy chubby guy in me doesn't want to play through twice... 
 
Games have gotten better with not spoiling things through descriptions, or leaving them vague enough that you don't  know what it means until you get there. But sometimes they slip through and you find out that you have to  SPOILER WARNING: Click here to reveal hidden content.

If I get en achievement or trophy then awesome, I like getting them, but I don't care alot

...and more games should move towards the achievement progress pop ups like Gears 2 and Shadow Complex

Whenever I earn a trophy, I'll look it up in my trophy collection just to see what I did to earn it. Otherwise, I don't really look at the trophies until I've beaten the game (then I'll go back and look at what trophies are available and figure out which ones I want to get).

I really pay no attention to the achievement/trophy list. Sure I care about them in a tiny insignificant way but I only really take a look at it when I first pop a game in the drive. After that I'll open that list once or twice just to track my progress as I naturally play a game, diverging every once in while to snag that easy achievement but I make no effort to S rank any game that I play.
 
 I do agree about the progress pop-ups they need to be incorporated into the current systems, great help when you are not sure how many more liquor stores you need to kill for their pelts (Greatest description ever).

I usually go through the whole game without really paying attention to the achievements. Once I've completed the game I check out which ones I'm close to or which ones sound fun. Then I go for those.

I only do em if they are easy to get.
 
But mostly I ignore em all.

i go in blind. after a while of playing them i look at them.

My usual plan is to do some research and try and get as many as I can in the first play-through, so long as it doesn't mean dicking about and ruining the game. Silly challenges and griding can wait, assuming the S-rank seems achievable/fun.

*clears throat*

blind first time, then go back in and get the ones i miay have missed.

I just play the game.  I could care less about trophies or achievements.  Really the only satisfaction I get from them are the great names.  "Down boy" in CoD 4 for instance.

I don't care for trophies or achievements, but I usually try to get at least 30% of them (which you can usually do with just one playthrough), just to keep everything even on the stats sheet.

I play the game until I've had my fill... shoot for some of the achievements, depending upon how hard they are.

I'll usually have a quick glance to see what there is just to see if there are any I can get as I'm playing through, though if I really wanted achievements I would make a point of a 2nd playthrough and gather them up then.