Personally I use ~/opt//bin where ~/opt is a ‘one stop shop’ containing various things, including a symlink to ~/local and directories or symlinks for things that don't play well with others (e.g. cargo, go), and an ~/opt/prefer/bin that goes at the start of PATH containing symlinks to resolve naming conflicts.

(Anything that modifies standard behaviour is not in PATH, but instead a shell function present only in interactive shells, so as not to break scripts.)

Unix lore: Early unix had two-letter names for most common names to make them easy to type on crappy terminals, but no one* letter command names because the easier were reserved for personal use.