Sounds like you just like bikes. Nothing wrong with that! Do what YOU want to do with the bike.
Some people like old bike's, some people like old car's... I saw a guy a few weeks ago outside my workplace in Plymouth riding a penny farthing (honestly!!!)
Personally I like more modern, but I can appreciate an older design, and let's be honest, there isn't 'that' much that can be changed about linking two wheels together in the lightest usable way possible.
I recently test rode a 1998 KHS Alite 4000. Really was a fantastic bike, but would have needed a fair bit of maintenance to get it back on it's feet. In some way's I regret not buying it, and other's I don't (I went with a 2008 Scott Sportster P3 as my aim was commuting).
I think retro can offer good value for money if a bike has been maintained well, and also that you feel better restoring a classic