Earlier quoted context omitted.
I actually find it easier to memorize the flags than to memorize the commands I created myself, because they're a lot more descriptive than short commands like in your examples. The few times I do come up with my own stuff, it's a 2+ line function (or full shell script) that can't be duplicated in a single command and can't be done as an alias.
I memorize the flags because it means I'm comfortable on any machine. Issue in production, and your aliases aren't there? No problem.
My conceptualization of "personal computing" is something more akin to a home or a garden. It's a place where I should feel comfortable and relaxed. Familiar. It's a refuge of sorts, a place where I will inevitably spend an inordinate amount of time, and actually have a lot of real life experiences reflected (through the form of personal writing). Whether working, reading or writing, I tend to think of these machine contexts really as extensions of and foils for my mind. A discoverable mind palace, if you will.