My favourite songs are The show must go on (makes me shiver everytime), Breakthru (great rythm) and I want it all (what a power).
As album versions, I don't like Under pressure and Another one bites the dust very much, but I think they are amazing.
And concerning to the tribute concert, it makes me nearly cry listening to Bryan May singing Too much love will kill you.

And you're right, Bryan has such a great individual guitar sound like no one else has.

And John Deacon is the first bass player where I can say: This is a great bass player! I'm used to that bass player always just play one single tone. But his fingers are running all the time and he's really talented.