I think Anakin is a bad example of a Sith. Anakin was driven by fear. Palpatine was driven by greed. If you are a selfish person who only cares about power then you'll be happy as a Sith. If you are becoming a Sith to keep people safe so you won't lose them, then you'll more than likely end up miserable; the people likely won't understand and you'll lose them anyway (even if they survive the maelstrom your violent actions set off).
Personal Note - As a Buddhist, I think being a Jedi is far better than becoming a Sith but that's because I prefer to help people, do the minimum amount of harm, and seek enlightenment. The selfless Jedi philosophy is more in line with my goals than is the selfish philosophy of the Sith.