I agree... the Venetian has a fantastic poker room. As does Caesars.

I also stay away from the Bellagio. There's always tons of action but they fit you in like sardines with no room between your chair and the one behind you. They really need to expand.

The M's room is small but very nice, and the South Point's new room is also great.

The Hard Rock is another place that has a great poker room, but very few players when I've been there, maybe 2 tables going and no one entering their tournaments.