Which album is better Lets Go or Rancid?
And out come the wolves is better in my opinion but Lets Go also rocks
Do you like the intensity of their music?
Yes, that is one of the main factors, the other is their Reggae / Ska sound.
Sounds like an interesting combination, does that make them unique?
Not necessarily but they did influence many bands after with similar sounds 
Who is the most famous band you think they influenced?
Its really hard to say, maybe Blink 182 to a certain extent
Oh nice, they're very popular right?
Oh ya, well atleast they were in the 2000's