Hi,
first of all I would like to say that in every member survey I opted for features like top viewed/favorites. It's a great addition to the gallery, and helps those who have no time to spot what RO artists have best to offer.
So I'm for those features, but have 2 questions:

Could there be 'today's top favorites' section too - pretty please :P ?
I kind of agree that 'most commented' will be occupied with artists who have most friends, which is natural, but well... not necessary best to find the best art. I think adding 'top favs' tab could add some usefulness to fun.

Could there be something like at DeviantArt site: only pics uploaded within last 24h are taken to a poll?  Now in 'today's top rated' there's pic from a year 2000!