Yeah, I just can't play evil, not even for Astarion. I can play a little on the OC is self-interested side, but not outright evil. It sets my anxiety meter to max and I start having palpitations.
Once, while playing BG 2, I decided I wanted to see what would happen if you help Anomen get revenge for his sister's murder. Once it was done, and I saw FALLEN PALADIN listed as my new character class, I had a panic attack and could not exit without saving fast enough.