I find I have stricter criteria for meeting older men. In addition to being attractive, they'd have to be smart(you're old, you should be experienced and well-learned so that we have something in common besides sex) and financially well-off(I'm young enough to be your son, you better be treating me like it).
On the first part I agree; intelligence is an attractive quality. However I don't want a "sugar daddy", I don't like to be treated like an invalid or something.