Ooh, awesome question. It depends on the villain, but I can say that I could hear my own voice coming from villains every now and again. Sometimes, a villain comes from unfortunate circumstances and faces adversity, only to turn to nefarious means to get what they want. Under the same conditions, I might have thought about such solutions on impulse, but would seldom (if ever) choose to go about solving my problems that way.
Case in point, one of my villains is an experienced, skilled contributor in their career field. He's been the best there is at what he does for ages. In comes the scrappy underdog protagonist to upset the villain's plans, uproot their normalcy, and possibly take over their "rightful position" in the hierarchy. In life, I've been both the "experienced veteran" and the "scrappy underdog," so I could empathize with either party involved. The difference is, I would never hurt the incumbent or newcomer to secure victory. I just don't have it in me to deliberately hurt people. The villain does, because I wrote him that way.
I hope that helps! 