Two beer styles I'm not a fan of but here goes

Knee Deep Tanilla and Moylan's Kilt Lifter.

Vanilla anything is a very small market space, people don't branch out once they find one they like, often it's the first or second one that they grab to try. Lot of beers that had nothing wrong with them end up as debris on the side of the road.

Yes, that and the Maduro and one other that I can't recall the name of. Thought Jai Alai was ok but not one I would venture to buy another 6er of. Maduro was a complete miss for me but to be fair I guess brown ales aren't my favorite style either.

+1

Plead the Fifth imperial stout.
From Dark Horse.

Top 2 or 3 when on tap.
Still very good in the bottle.

Cigar City Hunahpu's Imperial Stout

This beer and it's variants are rated #4, #14 and #23 of the top 50 by Rate Beer FWIW.

Fat Head's Oompa Loompa Chocolate Cream Stout is fantastic.

Southern Tier 2X Double Milk Stout is really good too.

Sam Adams Cream Stout isn't bad.

For Stouts and Porters, you can't go wrong with anything from Bell's. They have some of my favorites.

And the Deschutes Black Butte is also one of my favorites.

The Stone stouts and porters are all pretty good too.

Black butte Porter is excellent for use in cooking. I use it when doing stir fry, if I am using Pork or beef.