I like long solo's - but I also like short solo's if you hit the right tones like Richie does (ex: Prayer)...

My favourite solo's is:

Prayer - It's short, but he hits the right tones...
Wanted - It just sounds so cool - good skills.
Bad Name - The fingertapping-thing is so cool...
Lay Your Hands - Good skills!

And of course Dry County and 100 years because they're long and good...

What is your favourite solo?