Let me start off by saying, if you plan on dating someone younger than you, then you'll need patience - and a lot of it. The fact is, you may have your life figured out and they may not. They may still be figuring out what they even want to accomplish in life. They still might be a bit immature because they are still learning from their mistakes.
The biggest thing I've learned from dating someone younger than me is that just because I may be in a place in my life where I'm ready to settle, they may not be, and you'll have to learn to understand that.
However, when I started dating someone older than me, I was taken aback at how put together their life was.They are accomplished - settled with their own place and in their career. They are looking to eventually get married and start a family. They're mature, they've already had their fair share of heartbreak lessons, and they're more understanding. They take the time to listen to your concerns and be more patient with you. They don't have time to waste on people who are looking to play games - you're either interested or you aren't.
The biggest lesson I learned from dating someone older than me is that time is everything to them and they're not looking to waste it.