I feel a little dirty. I never bothered with the GBA game, I heard bad things, but I blindly picked up the original ZOE when I first got my PS2. Terrible, terrible game. Hated it.
A couple of weeks ago I got involved in a different ZOE2 thread, and was convinced that it was just the opposite, brilliant actually. I'm now the proud (?) owner of all 3 ZOE games. Haven't gotten a chance to play 2 yet, however.
In an interesting turn of events, I wound up with an extra copy of ZOE1 (+MGS2 Demo).