I can't really comment on the in-studio stuff as I generally switch off from that. In terms of comms, I think Ally McCoist has really been the only good co-commentator this Euros, and even he has his tics ('you're spot on...')
Jenas - has annoying pronunciation of some words, but more importantly, quite frequently does not read the game well
Lee Dixon - ok actually, bearable to listen to, and at least tries to make interesting and balanced points, just doesn't bring any enthusiasm with him
Emma Hayes - grated on me a bit. yes the stuff about tactics is mildly interesting but she talks too much and makes the same point repeatedly. I think she will get better though, she seemed a bit nervous. the enthusiasm is there at least.
Danny Murphy - adds nothing to any game
Robbie Savage - adds nothing to any game, and is very annoying
John Hartson - ok, likeable character and does not say too much, but adds little too
Martin Keown - awful, makes you want to slit your wrists, on par with steve mcmanaman who we seem to have been spared for this tournament
Karen Carney - can't warm to her and she lacks the insight of some others, but no worse than many of the above