Siebel Bry 97 (a.k.a. Ballantine "Ale Brewery" Strain, Anchor, Wyeast 1272, White Labs WLP051, and Lallemand Bry 97) has become my favorite non-British/non-European ale strain. Brewtek CL-50 (a.k.a. Wyeast 1450) is a very close second (it's probably the best strain for American red/amber ales on the planet). Siebel Bry 96 (a.k.a. Ballantine "Beer Brewery" Strain, "Chico," Wyeast 1056, White Labs WLP001, Fermentis Safale US-05, ...) has become my least favorite ale strain.