I'll be honest, I've never really been a fan and I probably never will be.
Yes he puts 100% in but isn't that a minimum requirement for a professional footballer? In the premier league you need to offer something more than that.
He's been chucked into several positions by Lambert which hasn't helped but I honestly don't know what his strengths are, other than running around a lot, which I don't think actually counts. He's not a natural goal scorer from what I've seen, he's not overly quick and his passing is pretty average