Hard to pick just one on a team with this much fire and pluck, so here goes my overall thoughts
Tied for first choice - Brad Wilkerson and Chad Cordero. Cordero for obvious reasons. Skilled young player, and very professional to boot. I'm betting that when he blew that save against Chicago he was biting his shirt so that the cameras would not catch him mouth obscenities. Very class act in what is undeniably a frustrating situation where most guys would curse up a storm and make no apologies about it.
I've admired Wilkerson for many years now. He's not quite as young as he used to be, but he's always been a solid player, and I feel like this years move to DC has been great for him after "paying his dues" in Montreal for so many years. I'm happy for him to be in the thick of things with big crowds behind him every night.
Other favs - I approached Guillen cautiously this season but I think he's been great for the club. He clearly has a passion to win, and although it sometimes gets the best of him, I do believe his heart is in the right place. I get the impression that he has a lot of respect for Frank, and that Frank has probably earned it. Sometimes that's all it takes for a so-called "cancer" to really shine. Let's face it, some guys just need the right kind of manager to really stand out.
Nick Johnson seems to be all business, so it's hard to judge his personality, but I definitely respect his performance. I just hope he likes it here. I'll bet the yanks are kicking themselves in the ass for letting him go.
Vinny Castilla is probably the most underrated player on the team. Pretty good producer, and always excellent defensively.
Church is having a great year, hopefully he can keep it up. Just be a little more careful with those wall-plays next time
Brian Schneider seems like the perennial National to me. Not a big name, but he goes out and plays his ass off every single game he's in, and often times makes plays that count. Ditto for Carroll.
I could say a bit about all the other players, too, but you guys get the point. I just love this team