I started with the Climax. Once I got better I realized it was way too stiff and kinked and twisted terribly. I've gone through phases of Climax, Frog's Hair, Orvis, Dai Riki, etc. as well, but settled on Rio. I did so after having all of them together with the same diameter (mic it, don't trust the spool!) and running a crude test to see which was the most supple. Rio won. I am a Powerflex guy and it is great stuff, never had much of a problem.
You can test the suppleness pretty easy. Just take an even length of the lines to be tested, of even diameter (mic it, don't trust the spool). And play with em, it becomes obvious which are the most supple. You need a tensile machine for strength, and many of the other properties only come through experience.
A few things:
We tend to bunch all mono's together, which is bad. There are 4 main types of line.
1. Single Strand Mono - High strength/diameter, high abrasion resistance. Very stiff. Tend to kink. Have memory. I tend to like them as leader materials, but not tippet. However, if you're after big toothy fish, or pulling streamers or something, they have their uses.
Examples: Maxima chameleon, Orvis SS.
Bait fishing examples: Berkely Trilene, most standard lines.
Winner: Orvis SS, though I like the extreme stiffness of chameleon for butt sections of leaders.
2. Copolymer mono - Most supple of all lines, which is most important for fly fishermen anytime you want a drag free drift, and important for castability among spin fishing lines. So these would be your best dry fly fishing lines almost all of the time, especially with smaller dries. They have very little to no memory. They do stretch, though not as much as straight mono. Stretch helps absorb shocks during the fight like a soft rod would, but makes hook sets on bigger fish less "solid." They also degrade with sunlight and water, though this process is slow and most of us use a spool before this happens. And they do tend to twist, which comes with suppleness.
Examples: Most tippet materials.
Bait fishing examples: Tectan, Silver Thread, most "castability" specialty lines.
Winner: Rio Powerflex
3. Flouro - in suppleness, they roughly bridge the gap between single strand and copolymer mono. Stiffer than a copolymer, but not as much as a single strand mono. They do not stretch, unlike either type of mono. They sink, which can be an advantage or disadvantage. They're slicker, meaning knots pull out easier and split shot slide easier. And theoretically at least, they are less visible UNDER water, though this advantage is lost on the surface or in the film.
4. Braided (and this includes furled leaders) - They actually win in many measurable categories, especially in thicker diameters. The negative is that they are very visible.