I've gone full circle, started off in rigid bikes before the invention of man made theme park riding (I think - certainly before the Marin trail), progressed to a hardtail, then went lighter, then to a short travel full suspension through to a full on 'all mountain' style full suspension and then back to a rigid singlespeed that got 'upgraded' to gears two years ago
Also had a mix of road bikes and a fat bike in the mix too, as well if commute bikes
The full suspension was great, gave me the confidence to carry speed and attack the trail (did I just type that...), whilst the singlespeed gave me the power and I guess, that 'zen' feeling of being at one with the bike (seriously, what am I typing?!).
I'm most happy on my rigid bike now though, I'll ride anywhere with it and I do t have to worry where I'm going with it. Most of it is roughy stuff and bridleway exploring but it does get shown the odd hill every now and again
Strangely enough, I've only had two types of bikes that I've bought for one sole purpose, the roads bikes for ermmm, well, road riding and my fat bike was bought for racing in the snow. All my other bikes have been bought out of want rather than need and I guess to some small extent, my riding style has changed depending on what I was riding. Saying that, I have been known to go out on the singlespeed whilst my friends are riding 'enduro' style bikes but it does my for an anti social ride :-/