People get a safe but vile-tasting laxative by default. If you don't have any known problems with your colon then you could ask for a faster-acting laxative that is easier to get down.

I have a condition so I have a colonoscopy every year. Once I had found out about there being a fast-acting option, I've always chosen that.

I've never done it sedated. I prefer to watch the screen and and ask questions. I've found the view quite fascinating, actually. The doctors and nurses have always been professional, focused on the colon: not the butt. There is absolutely nothing sexual about it. I've never felt pain: only some tension, and that's been because of gas (needed to get a clear view). It is perfectly safe unless your colon has some illness of some sort. The worst part has always been the prep.