Back to topic: It just seems that screwing around with different species and trying to "maximize" stats (get as high stats as I can with 2 as a minimum attribute) that I seem to get more or less the same end result across the board. So unless I really missed something, all characters are basically the same and it will really only make a difference on how you play and what career appeals to you. Raising attributes through talent trees: You must go through multiple trees to improve multiple attributes or once you get there can you purchase them multiple times?
Pretty much correct on all points. Some species offer something that other species can never get (like Falleen pheromones) but generally just about every species is viable for every build even if some are slightly better or worse than others.