Wow, this is an interesting topic...
If I could I wouldn't mind living in the early 90s. Of course, Britain was still in recession, we had John Major - a complete idiot - as PM, the internet had only just been invented, and mobile phones were the size of bricks, but there were some advantages.
Train fares were much cheaper, life went at a slower pace, and most importantly, I'd be able to look round Pompey as it was in the early 1990s (lived there as a kid).
Back in the early 1990s, I could travel round the NSE network for a nominal sum on one of their "Network Days". So theoretically I could do Waterloo - Salisbury behind a 50, Marylebone- Aylesbury on a 115, Waterloo-Weymouth on a 442, Southampton-Pompey on a 421, and maybe even Reading - Poole on a 47 with mark 2s or an HST. I've always (though this is no longer possible) wanted to travel on the Waterloo and City line when it was part of BR, and travel on one of the English Electric tube trains built in 1940 used on that route. Of course, I wouldn't be able to fit that all in a day, and there are a few routes I've probably left out.
But still, nostalgia is a powerful thing...