Best game for me?

Okay so I am picking up a psp tomoro and want to know the best game for me to get as a first.

I am really into fps so what is the best one out there? Also how do the controls work with just one anolog stick, is it like classic doom where you just cant look up or down or what? 

Thanx heaps guys :) 

There are a couple FPS out, and I personally like them all.  Medal of Honor: Heroes is awesome, though the single player missions don't last very long, the multiplayer is awesome (as long as you don't run into any hackers).  Coded arms is very basic but it is still pretty fun for a while.  There is also a new Coded arms coming out soon.  Also, Call of Duty is another good game, but only the single player missions are worth playing.  Ghost in a Shell is out too, but it isn't as good as the other three mentioned.

Call of Duty is newer and still costs $40, Medal of Honor Heroes is $20 at target, Coded arms is $15-20 most places, and the new Coded Arms is coming out for $30...so there are a decent number of choices for you.  Personally, I like Medal of Honor the best.