Hip-hop is the streets. Hip-hop is a couple of elements that it comes from back in the days... that feel of music with urgency that speaks to you. It speaks to your livelihood and it's not compromised. It's blunt. It's raw, straight off the street - from the beat to the voice to the words.
I think when people say 'real hip-hop,' they want it more buried in the streets. They want it more connected to the streets and the grime and the roughness of the streets. They don't want the fluff.
Hip-hop is more about attaining wealth. People respect success. They respect big. They don't even have to like your music. If you're big enough, people are drawn to you.