I'll take something from 2005 as a compliment to Linux Mint. Having installed it in 2006 you are absolutely correct. It's shockingly boring lack of constant UI paradigm shifts almost makes me forget about the OS completely. I'm at the point in my Linux journey where I see slow adoption of new things as good. I accept others have setups that mint does not work for, but I would wager there is no Linux DE better suited as a first suggestion to try depending on the newness of the hardware. If you have 5 monitors of differing resolutions and frame rates then sure, there are better DEs.