Not a particular Ubuntu fan myself, in part as I prefer the KDE desktop to (there is KUbuntu btw but it never feels as well integrated to me as my chosen OpenSuse) Gnome.

My own suggestion is to try a few and find what suits you best. I'm certainly not in the camp that considers someone a twit if they find they do prefer say Ubuntu and Gnome, or perhaps Fedora, etc. to my choices but with so much free,trying different distributions is easy and you might find the one that feels the best fit to you. To me, it's about freedom and choice on this.

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Other personal reason for me liking OpenSuse is I get on well with the Yast interface. To give one negative, I do have some unease about the Novell/MS business.