I'm sort of in that position. I bought about a year and a half ago, and while I didn't count on the rates going down, I did hope they might. I also realized that 6% is about the long term average mortgage rate in the US.
It was still a good deal for me, because I went from a townhouse to 5 acres in the country, and I have started (slowly) turning it into a homestead. So yeah, the well pump going out this spring wasn't something to get excited about, but overall it was still the right choice for me. YMMV, etc.