I'm not good at being evil. My last game (the one that the metaverse shows as 0 points but was actually 9784, more than all my other games put together) is listed as Pure Evil, but I was actually Pure Good for most of the game until I finished researching all the good and neutral techs, as there were no good races to buy them from (my random alignment generator has a love of evil). I then had to go pure evil in order to get the best of the evil techs, since the Pure Evil races had been conquered before they made it that far. And I did that without the repeated colonization trick, though I did have help from the creative pick
Most of the time I play good, though I don't hit pure good until late in the game, because I have a problem seriously screwing over my own people with a good choice that is of the "bend over so that we don't bother the other party at all" type choice when the neutral choice has a minimal impact on both parties. I'm most sensitive to that when it comes to negative PQ or morale adjustments on a planet that is already marginal to begin with, though I really hate getting a -38% PQ penalty on the only Class 26 planet I found in the game.
In fact, the only game I expressly set out to play evil in was the first time I played random alignments, and wound up with two pure evils, two chaotic evils, and one neutral. Realized that there really wasn't much of a payoff to playing good in that galaxy.