I have just come to the same realisation about my own titanium hardtail. Maybe I got sucked in a little by the hype of the all-mountain geometry with a 65 degree head angle and the stories of it giving you "extra" travel at the back relative to other hardtails. Once I took it out on a proper run it lived up to all the hype going up, being light and very stable. However, pointing it down, it was simply no match for the full-sus i'd just replaced it with.
It made me realise my riding requires rear suspension. The number of times I tackled stuff I would have relished before, simply to get bucked around and simply thrown out of my cleats, became extremely limiting. I couldn't get any continuity through the rough stuff and started chickening out on things I used to attack. This all made me very sad.
Until I finished my new meta 5.5 that I got a great deal on from Commencal. Now my world is bright and beautiful again! (And if anyone wants a 20" 456 ti frame that is all of 6 weeks old for a reasonable price, my email is in my profile :D).