I could say Playability at first shot, since I don't want to fight against my axe and the Tone you can always sculpt in the Amp's Eqs... But I must say that since I bought my Rogue I can't play anything else.
Ok, it also have a great playability, but Tone is really addictive. I was never satisfied with the sound I used to get when I played other brands. May be I could get happy with the sound at stage sometime, but never had full pleasure when I heard myself in front of the PA (or had to deal with its leakage). Many times I argued with the Sound Tech to get me out of mud... But, now?
Just joy!
So, nowadays I would say Tone first to make a choice and Playability then to discard options.