Gibson Les Paul Custom.
Bought up at Sam Ash in Huntington NY (or is that Melville?). Within a few months, the neck went south. Literally, to Florida! Then it twisted something like a cross between a kruller and Clinton's alleged Johnson. That is, it bent in an arc downward toward the high E, such that you could actually see it get unplayable close to the fret ends at around fret 10 to about fret 14. To make things worse, you look down the neck to the bridge and it twisted a good 10 degrees. Gibson dealers were few and far between down here. I took it to Modern Music in Ft Lauderdale, got to meet Lonnie Mack, who happened to be in the store, and they sent it to Kalamazoo (a mistake, since it should have gone to Nashville). When it was all done, Gibson refused to do anything, and I sold the guitar for scrap value on the hardware and pickups.
Best guitar I ever had? Hmmmm. That natural ES-333 is pretty dang nice, its got Phat Cats in it, switched to the old 335 trapeze tail, and is a tone monster.