Guinness is a good ol' reliable. Smithwick's just released a new bottle (rather the label is now red), so I had to add that to my collection.
Recently, I picked up Narwhal (Imperial Stout), a lot like Old Rasputin (which I looove).
Also, I had a Bourbon Barrel Stout (you can really taste the bourbon flavor...) not that bad.
All in all I added a few more bottles to my collection.