I mostly played AD&D. I tried D20 but I could not play consistently for me to get a feel for it. I still want to try Ghostwalk, however.
I remember rolling good enough to play a paladin for one campaign. Because the DM enforced alignment restrictions, I had to pick something that would fit with the party, who were mostly lawful or good told him that I wanted to be a paladin of a vegetation god. Doing that gave me enough freedom to work within the party, but still not violate the edicts of my Deity.
According to the Complete Priest's Handbook, a vegetation priest basically looks after the wilderness. I was in charge of protecting the wilderness. I was not too concerned with the people and things living inside the wilderness, and I got along with rangers, druids, huntsmen, trappers, adventurers, and so on. To me, as long as they did not harm the wilderness more than was necessary, they were allowed to move though it. What is more than necessary? Well, gathering firewood enough timber to build a house, and gathering enough food and game to feed a family is fine, but chopping down trees indiscriminately or hunting animals for one part then leaving the rest for the wild animals was a no no.
I got along great with the rest of the party. Never had to deal with the prisoner's dilemma because the DM never put us into those situations.