>>1 I think yes ... When you have power on something (or someone, but I hate have power on a friend or a normal person), you can control it, you can do whateaver with it. So you can change this thing (or person) to something you like, you can enjoy this modification.
You can be as well more confident and have the impression you're doing something in your life (btw you can do lots of great things without controlling someone)
Stupid exemple : When you play at a MOBA game, if you're doing most of the kills, you gets objectives ... You have the power, and when the game end, you feel great, your team wins thanks to you.