I should start reading the threads from the first page as this really threw me as I was wondering what Erikson had to do with Hobb and GRRM, I'm easily confussled
I've not read any Eriksson, but I have read Hobb and GRRM. I do enjoy Hobb's books but they are more the all tied up in a nice little bundle and good prevails against evil in the end, whereas, with GRRM I'm not sure we are going to get a nice, neat happy ever after.
As prevous posters have said, Hobb is more from the POV of one main protagonist (except Liveship Trader trilogy) and her characters are well written and you get to know them well, even to the point of annoyance, which I like as people are annoying, even heroes.
Martin's book are more on the epic side of things, his worlds seem more real, and more deadly, characters aren't always either good or evil they are just human with all the shades of grey that comes with that.
Try them both and see which you prefer. I think I'd read Hobb first as you might be disappointed if you read and love Martin and then read Hobb, his work just seems a bit grander to me, more filling