I do improved clinch knot in mono
San Diego knot in fluorocarbon
Trilene knot in braid, with a long tag end and glue
Blood knot to attach any two lines

I've said before and will say again... The knot you tie should match not only with the type of line you are using but with the brand. I happen to believe that Big Game works well with a palomar but bad with a clinch knot. I also believe that Triple Fish Camo works well with a clinch and bad with a palomar.

People's bias toward certain lines are probably a result of the knot they prefer when they start using that line. If chance dictates that the knot they like works well with the line they try - they will be happy. If not, they'll probably never use that line again.

Most line tests compare the lines with a single knot. The more objective test would be to test the lines with a variety of knots. When someone does that test objectively - I will be interested to read it.