Personally, I've found that when a table host finds you, you're apt to have a better experience (and host) than the other way around.

I've also found that table hosts tend to hear about players from other casinos. For example, when my family and I checked in at the Wynn on a free room email offer, I was surprised to find that the comped room was upgraded to a Parlor Suite (which is over 1200 sq feet). The casino host introduced himself to me at the tables - and has garnered a invite to a poker invitational, and a another weekend with comped Garth tickets.

Comparatively speaking, when I asked for a host two years ago, I had difficulties even getting a comped resort room from him!

Similarly, my current GVR host must have picked me up from some "list" somewhere, since he gave me three nights RFB (after having not played there for almost a year!).