Ten is my favourite album ever ... so much so that I got the £100 boxset of it released last year
Vs. is a close second in their albums for me. Check out the self titled from 2006 next, its better than Backspacer IMO.
Pearl Jam are my joint favourite band along with BJ. Seen them 3 times live, always an amazing gig, and I'm looking foward to seeing them again at Hyde Park this year, as long as I get a ticket!