Likewise, I find the MILF's, amongst many desirable qualities for me, is that they are realistic in their expectations and appreciate repeat business.
Myself, I'm way past my prime though I HOPE there's a ways to go on the expiration date. But being clean, respectful, and a reasonable human being goes a long way. As the Thai's say, khun jai dee, a good heart, tends to be greatly appreciated (which only goes to show there must be a lot of assholes out there).