Regarding their personality I like Shadowheart most.
Astarion is a psycho, Leazel is "I am better than everybody else." even though she does not have a clue, Gale is "I know everything better." and Wyll really wants to be a hero.
I respect Shadowheart for being pragmatic.
We need to solve the problem in our head, we are not here to help everyone or to kill everyone.
Try to get maximum profit with minimum risk.
I think this is the most realistic point of view in our situation.

Prof. Dr. Dr. Mad S. Tist

World leading expert of artificial stupidity.
Because there are too many people who work on artificial intelligence already