Which season are you on now?My favorite is probably Road to the Multiverse... it's a really creative episode and the best in the Road To series.
Some other episodes that I really like were Back to the Pilot, Wasted Talent, and an unpopular one: Three Directors (from Season 16).
I have not watched Brian and Stewie yet but once I get to that season I will watch it. All of the other choices I have watched.