I do not think there is anything wrong with your “criteria”. An opinion on music cannot be wrong, per se. I feel it [your opinion] is aimed at redeeming yourself as regards “objectivity”, (which the title of this thread and it’s contents have nothing whatsoever to do with) but I cannot claim my opinion as any more valid than yours. I can even point out that, since our heated disagreement in that thread, you have been going to Iambiguous’s threads as well as this one of mine, instigating tangent and potentially volatile discourse, blatantly alluding to said thread, and that you are doing so most obnoxiously; that does not make your “opinion” wrong.
By the by, I did hint above at some possible criteria for talent/skill: meter, progression, chord structure, note divisions, use of pointillism, multi-instrumentality, irregular instruments, multiple genres in one song or inability to classify as one distinct genre, strength and depth of message(s), epic length comparable to operas of old, etc… But we’ll just let that slip. Also, the fact that you favored the virtuoso over complexity of composition says quite a bit: you’re enamored with the performance rather than the piece itself.