I found the Song of Ice and Fire books to be rather boring. They do provide some entertainment, especially in the beginning, but I could never shake the feeling that they were needlessly bloated. Slow and tedious. The "current" book I partly read vertically until boring passages, which spread over numerous pages, finally ended. The "addiction", for me, consisted mainly of the vain hope that something actually might happen some time soon. I also didn't enjoy the author's tendency to kill off so many plot characters (I also feel his characters are too flat.)
The comparison to Tolkien is correct in one way: They both had/have a boring writing style.

Tolkien's story felt more meaningful, though. And yes, I realize these aren't popular statements.

I much prefer writers like Robin Hobb and the newly discovered Brent Weeks (the Assassin trilogy is frequently a little crude, but I actually care about his characters and the pacing is great). Then again, I also like David Eddings, so maybe I'm just a terribly shallow fantasy reader! Patrick Rothfuss' first book, The Name of the Wind, blew me away. I was so excited about the recent sequel, and what a disappointment it turned out to be. Not bad per se, but it consisted of endless pages of "nothing happening" and was the typical "filler" book that many trilogies seem to be plagued by.