Mikkelson is an extremely smooth skater who moves the puck fairly well and makes sound decisions. He's reasonably big, but not physical at all and never will be in my opinion. Early second round is a good bet for him.
Kohn is one of my least favourite guys this year for how he's ranked. He's not big, not physical, not a good skater, and not particularly good defensively. I don't even think he's that good offensively, although I know that's supposed to be his strong area. I wouldn't take him until the late rounds, but people who know much more than me and actually do this sort of thing for a living say he's a 2nd or 3rd round guy.
Drazenovic is a decent skater and passer with a very effective quick release snap shot that he needs to use more, and he makes player around him better. He will make a great junior player, but his NHL ability is questionable because of his lack of size and strength.
After seeing Scott Jackson again in game 7 against Kelowna, I like him even more. He responded very well to the situation and I thought stood out as one of the best players on Seattle. He makes very good decisions with the puck, never finds himself out of position, uses his body to separate the man from the puck, plays a physical game and really looks like a guy who will translate well to the NHL. He isn't exceptionally fast north south, but he has great lateral movement and mobility. I'd have him as the best draft eligible defenseman out of the WHL this year, although 2005 is uncharacteristically weak for WHL defensemen.