1) Brother Mace: great at improvising and an all-round enjoyable character who could work in a lot of different situations. I think hs character was limited by always sitting behind a table. Would be fun to see him help a dungeoneer along a floor puzzle or face some other challenge together. Basically I think the actor was great and I would throw him into as many different situations as possible!
2) Pickle - but IN the dungeon. I think he'd work well as a character in the actual game play, plus he could wind Treguard up by cheating (much like he sometimes did in the antichamber by saying too much or sneaking food into the napsack).
3) Greystagg/Sidress - both great characters particularly the former. Characters who were "potential allies but ultimately unaligned" were almost a clichรฉ in KM but this one pulled it off perfectly. You knew she'd help a dungeoneer but you also knew they'd have to tread VERY carefully with her. You could tell she really detested dungeoneers but only helped them because she detested Lord Fear that little bit more. As for Sidress, she wouldn't be my top choice for characters to bring back, but I did find her funny and since we're bringing the actress back we might as well have both characters.
4) Gundrada/Malice - in this instance I very much like both characters and would choose them both even if I was forced to put them in seperate entries. I think Samantha Perkins as Gundrada was one of the best in the series at improvising. She quickly built up a comfortable rapport with the dungeoneers and provided humour and a great deal of help to the team, while ultimately keeping her selfishness in the end ("I'm a bit bored of this now, I'm off!")
As for Malice, despite having a kick-ass name for a villain, she was deliciously malevolent. I loved that in some quests she was the Big Bad of level 3, and in others she could be found in level 1 handing out the eye shield. You never quite knew just what her motive was, but you were always sure she couldn't be trusted one bit. She was scary when she appeared all giant-faced and lightning-eyes, but she was even more unsettling when she was suspiciously trying to befriend them.
5) I would say Ariadne, but I guess she's more of a monster than a character, so my 5th choice would have to be Skarkill. I think he's an underrated character. I love lissard and also Sylvester 'Ands (who doesn't?) but they both had comedy elements to their characters and while Skarkill did as well, he was much more serious. He really wanted to kill those dungeoneers. And since my other entries inluded a lot of comedy characters I had throw in someone who was a genuine threat and there are few scenes in Knightmare more menacing than the Dwarf Tunnel scene where you can hear Skarkill's voice hunting and taunting the dungeoneer... chilling!!
There are other characters who I LOVED in the original series but plumped not to include - for example Hordriss. Everyone loves Hordriss, he's awesome. But I think by the time we reached Series 8, he'd done all he could do. He'd been in every situation, and he'd gone from untrustworthy mage to pompus but kindly old grandfatherly type figure. He was great but I'm not sure what he'd contribute to new episodes that were original. I'd rather see someone new offer something... new!
And I say that with no disrespect to Hordirss as a character or Clifford Norgate who played him.
and as such never got to be used to the full potential the character seemed (to me at least) to have going for him.
Maybe they planned to make him a turncoat [or Lord Fear was going to get a new right hand man] and didn't get the chance. 
