Say What I Do or Do What I Say?

My recent foray into the world of volunteerism reveals two kinds of people. Are you a "say what I do" type, needing lots of repeated thank you and recognition? Or, are you a "do what I say" person -- one who follows through on what they agreed to do without focus on recognition?
I met both types. Unfortunately, those that say they will do something and don't follow through will give me a lasting impression of them. I know they couldn't care less what I think, but I am not impressed by their character for taking credit when NO credit is due.