I personally have a similar preference (but its only a preference, not a requirement). I prefer gents over 33. Here are my reasons, all based on my personal experience:
1. Younger men tend to understand the importance of respect between men & women
2. They are more likely to be time wasters
3. They tend to feel entitled (we had fun, so now it should be free)
4. They are more likely to participate in an element of society I prefer to ignore
(i.e. drugs, physical fighting, etc).
5. They are less likely to be established professionals, which really helps with a shared
interest in discretion!!! If you have something to protect, you're more likely to be
discreet.
I don't worry about meeting someone I know socially because I don't know many younger men. I also enjoy the fact that most older gents will treat our meeting like an actual date...its nice to respect and be respected.