I enjoyed Kessen III, it's the only Kessen game I've ever played. It's not all that strategic but the graphics and gameplay are pretty cool I think, I also enjoyed the character development and story line, it was pretty long and a part of me liked the fact that it tweaked Nobunaga's death and made him survive, just because it is different. Although I think having the option of him dying would have been cool too and taking over as Hideyoshi. All and all, I think it was pretty fun. I haven't played it for a little while, though.
"Know thy enemy and know thy self, find naught to fear in 100 battles. Know not thy enemy, but know thy self, find victory and defeat in equal measure. Know thy enemy, but know not thy self, find defeat in every battle." -Sun Tzu