Do you feel more comfortable on a self supporting, "A" frame type of tall ladder, or one that leans against a tree, or house, for support?

I don’t do ladders so good any more. I need to clean my gutters. All we have is this 10 or 15 foot A frame ladder. I don’t like climbing on that thing, Sam I am. I think I’d feel more secure on a regular ladder that would lean against the house, but we don’t have one at the moment.

Am I wrong? Would the sense of stability be just in my mind.