I'd really like to switch to a Debian-based system, but ALL Debian-based distros seem to have TERRIBLE battery life, whereas Mint 17 has an excellent one (better than Arch/Manjaro or Fedora and on par with Windows 7). Sigh. And yes, I'm using powertop. Without it, Linux battery life is horrible.
Manjaro (I tried the XFCE flavor) was really nice. It didn't support Bluetooth, but at the time all distros were having some problems with upgrading to BlueZ 5.
Regularly, they have some kind of update packs which they announce on their blog/forums, in case you should get any problems, and the community seems very nic. Definitely try it!
I used linux mint mate for a while - while it's a generally serviceable fork of ubuntu, there are a number of problematic issues which crop up due to it being a fork - especially when doing routine upgrades.
I'm somewhat wary of forks now. Deviating from the standard configs is asking for trouble when it comes to upgrading.
If I preferred MATE, I'd probably use this over mint for this reason.