But the 18-year-old me and the me of today are such completely different creatures, as they are for most of us.
I was then a shy, insecure small-town girl with acne and frizzy hair who was convinced everyone else was 10 times more intelligent, funny, better looking and cooler than me. If only I could go back and tell my 18-year-old self they weren't.
In hindsight, my hostel mates were perfectly nice, normal teenagers and the insecurity that dogged me was in my head rather than in anything they did. But I wonder if I would revert to that person again if I was back surrounded by them.
After all, no matter how grown up we are, we can all get a bit teenagerish and snappy with our parents. Get back around high school classmates and the pretty ones are still the pretty ones and the nerdy ones still the nerdy ones. Even if they're not.
In movies and on TV, reunions are always about proving how much a character has changed, what they have achieved, or just how much hotter they look without the acne and braces. They invariably rock up with a hot body, a partner on their arm and an impressive life tale, eventually triumphing over their school bully or boyfriend that dumped them.
In real life there's probably a bit of that as well, but more importantly it's just a chance to catch up with old friends and reminisce about the past.
And I admit that side of it appeals. I recently attended a mini-reunion with a few old tennis friends. It had been about 10 years since I'd seen them, back in the day when I could rock a tennis skirt and my backhand came with a grunt Serena would be proud of. And we had a blast.
So I think I will harden up and go back. While I may not have a fancy house, six-figure salary and definitely not a hot body to show off, I am who I am and now, with 20 years' amazing life experience under my belt, that's finally good enough for me.