I had a blast with JA1, I had a blast with X-com (very similar).
I had a mega hard on with JA2. BTW, did u select the Sci-Fi campaign or regular? (Sci-Fi adds a twist).
I didn't have much problem with Unfinished Business, it was silly short.
JA3 is supposed to be in 3D.
In the genre, if you come accros Fall Out 2, take it.