I think that every material has it's good and bad sides. If there were a "perfect" material, all bikes would be made of that.

I currently ride an Al road and Mountain ride. I have test ridden carbon fiber frames and ti frames and until I have enough expendable income, I can't make the cost to benefit ratio work well enough to make the switch.

Of all the bikes I ever owned, i once had a Diamondback mountain bike made out of Easton Elite tubing. That thing was sweet. It rode like a mix of alum. and titanium. It really broke my heart when i cracked that frame. (after the warranty had expired, which is another issue altogether.)