BaehrTKD
Green Belt
I can see having a particular series for forms #1-5, but to number techniques or combos to memorize is not to my liking. Reminds me of the old song, Secret Agent Man, where they "give you a number and take away your name." In my style there are basic kihon, upper and lower body techniques (about 30), that are referred to by some teachers by number. I much prefer just saying the name. In the very old days of karate, the moves didn't even have names - just, "against left head punch, move your arm like this, then do this kick to his knee." There were no lists, just privately handed down oral tradition.
The reason for having a naming and numbering scheme is so we can say: "Do #4" versus having to say the text in bold above.
It's purely for convenience.