All this tone chasing; an element I find of vast importance is whether the amp is pointed at me or not. If my amp is behind me and pointed at my head I don't like it. I really don't like it. If I set the amp to the side and down a little it is much more enjoyable. This has nothing to do with volume, but rather the higher frequencies hitting me. Of course this does not affect what the audience hears but it sure makes my gig more pleasant for me.