I absolutely agree with you. I've been going there all my life, nonstop, any season... and my family even has a pad up there... but I cannot get enough lake Tahoe to feed my fix. It's just too awesome, theres so much stuff I still haven't fully explored, the people there rule, and my god is it pretty. I've been to many places in this world, and it has to still be top of the list for me.
And here's a few places I also love dearly.
Desolation Wilderness - Crystal Range (Just southwest of Tahoe)
Crater Lake, Oregon
Yosemite - Can't not put that here.
Tetons = aslkfdhasldkgahsdg
This volcano in El Salvador had the most insane view I have ever witnessed.
Acapulco, Mexico
Glacier National Park, Montana/BC
Sedona, Arizona
The palm groves in the desert outside Palm Springs/Indio - Where the species fuckin originated
Kings Canyon, NP
.....too many to name.