I'm going to chime in on this discussion. As someone who goes to Las Vegas/Laughlin about 10 to 15 times per year for the past 15 years, I certainly understand what you're saying.
I do agree with "time makes the heart grow fonder" remark. Perhaps it's simply time to go somewhere else for a few years. If you like to gamble (and it doesn't sound like a main purpose for you) then you can always go to some of the less popular spots--Reno/Tahoe, Tunica, Atlantic City, Laughlin.
During my Hit 'em All Nevada trip a couple of years ago, I had the BEST time just driving around the state enjoying the miles of desert landscape and visiting out-of-the-way mom and pop casinos and bars. The focus was never on gambling, it was about exploring and people watching.
I always tell newbies in Vegas that they're going to get to a point where it's simply senses overload, and let's face it--a casino is a casino is a casino and after a while, they're all the same short of the wall decorations and the dealer uniforms.
I, too, get burned out (and if anyone, I have a right to be), but somehow, I've turned my trips into adventures in writing and searching for that one place I've overlooked or missed.
If you still go to Vegas, consider not gambling at all and focus only on the things you like to do. But it does sound like a couple years break might be in the cards.
Best wishes and keep us posted.