Mary Beth is one of my favorites. Always looks and acts professional and polite, never talking over a guest, always bringing up questions that the viewer may have (and I know other hosts bring up questions, too, but Mary Beth seems to have more "useful" questions, if that makes sense). I was watching her a week or so ago with that home decor lady, and Mary Beth asked if an item was along the lines of shabby-chic (which, imho, it kind of was, too), but the home decor lady kind of smirked and said 'no..it is vintage'..(or whatever the home decor lady called it). Mary beth was very respectful and 'corrected' herself, agreeing with the home decor lady (even though, really, to me, the item was much more shabby-chic than vintage, lol).
Any way, Mary beth is a sweetheart. Always professional and very respectful and dressed nicely...not looking like she just came from the gym or just showed up to mop the floors.