My only counter point would be time. You can change a lot over years. I am a very very different person than what i was at 25...and even more different than what I was at 20. There are chances that they have changed enough where those differences are long gone.
I would love to meet my ex from age 23. She was one of those changing moments in life, and I think we could still hit it off now. She was headed down a path of change as well, you just never know how close you might come.