CentOS is a very interesting and different choice for a desktop distribution. I haven't heard of many people using it that way. Whenever somebody brings it up it's usually within the context of running a server.
I can understand the desire of the writer for longer term support, and also his disenchantment with GNOME 3. Both things can be a problem for certain kinds of users. GNOME 3 has caused quite a bit of controversy and...er...robust debate among many Linux users.
But I think Linux Mint Debian might have been a better bet for him. The Linux Mint developers provide some useful tools for desktop users that improve the overall experience, and Debian works extremely well as the base for LMDE. Plus, it is a rolling distribution so you don't need to reinstall the system to upgrade it.
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