Count me in as another fan of Rob Morrow on "Northern Exposure".
*And still wonder every now and then how John Cullum was never nominated for an Emmy on that show.  He wuz robbed!
As for Rob Lowe...  I never really liked him when he was a member of the "Brat Pack" - there was just something "not right" about his look to me.  Then when he tried to be "grown up" in "The Hotel New Hampshire"... Ugh!  And then the whole video-taping scandal at the DNC... Double-Ugh!  However, I do have to say that he has grown on me over the past couple of years.  When he started on "Brothers & Sisters", I was very wary of his being added to the cast.  But it's a good character and great writing, and he's handling it all wonderfully.
Alas, Rob Morrow has tended to grate on me the past couple of years.  Ah, well...