selenak asks me, "Favourite male recurring character not Methos on HL, and why, and favourite female recurring character not Amanda, and why. :)"
She further clarified that this was restricted to recurring characters, not regulars, so no Joe or Ritchie.
An interesting question. There were a few good recurring male characters, both heroes and villains, and I think my favorite would have to be Kalas. He was a K'Immie, the HL fandom word for villain Immortals, as so many of them had names that started with K. Former monk and sometime opera singer, he developed a hate-on for Duncan when Duncan got him thrown out of a monastery for the piddling reason that Kalas was there to gain the trust of Immies who wanted to cool their heels on holy ground, and he would then follow them out and lop off their heads. Later, he tried to kill MacLeod's girlfriend, and MacLeod responded by slashing his throat, ruining Kalas's singing voice and giving him another reason for the aforementioned hate-on. Kalas was a scary, yet fun, villain, very stylish and cultured and prone to villainous one-liners in his deep, growly, scary voice.
Female recurring characters are a bit harder. I'm ruling out Tessa, since she was a regular for some time, and I only watched about half of the first season, anyway. I think my favorite, then, would be Rebecca, Amanda's mentor. She was played with such grace by Nadia Cameron, and though she only appeared in two episodes, she made a deep impression.