Long post follows
I tried itwhen I looked for alternatives to True Combat, and gave it an even chance with Infiltration. Inf won on several points:
1) Long rounds: I usually wind up dead in a hurry, and have only short time to play. Inf DTAS is usually 5-8 mins, while AA last 10-15. This off course does not apply to you.
2) No offline: Makes it even harder to learn the game.
2a) Servers: The most important point for AA is that you almost always can find a populated low-ping server playing the map you want to play.
3) Only U.S. teams: While I just might be able to live while playing a US soldier, it is _really_ annoying that the enemy looks like eastern bloc forces or terrorists, but their equipment behaves like western equipment.
4) Very limited equipment selection: I use at least 5 loadouts on very regular basis. In AA, I am stuck with an assault rifle, or a LMG if I am lucky.
5) Points are given for kills. This leads to public play being dominated by killers, not teamplayers.
6) Few maps. Further, the servers just run one map instead of rotations. My brother-in-law plays nothing but Bridge, having become a specialist on that map.
7) User development: In Infiltration, when somebody has a good idea, he or somebody else make a mutator. The game keeps getting small tidbits to keep it fresh. Examples are the constant additions to the armory, new maps, SWMN and RealTargets, LM, Botdirector etc.
8) sys reqs: I get twice the fps in inf. May not be an issue for you.
9) People are, on the overall, a very friendly bunch here. The a**holes have left or are well known, and the feuds I see are so old that they do not affect us new ones. I have only played one or two times where the people around were unpleasant (no names mentioned here)
My aforesaid brother-in-law plays AA in a clan, and a lot of the issues mentioned here would be lessened with experience. However, unless you really want to spend a lot of time with AA, I think that Inf is a superior game.
-Freshmeat (rambling)