I always liked having a top 3 years ago.
For quite a long time it was: Ride, The Stone Roses and Nirvana.
It's quite a bit different now, but probably the 2 bands that mean the most to me are Radiohead and Mogwai. Number 3 could be one of about 50 bands, but Low might be the closest to that esteemable position.
Do you have a top 2 or 3, or whatever?
Is it quantifiable anyway?
I don't know.