For instance, since the shell has command history that persists between sessions, once you've run e.g. "git push" once, you can run it again by typing e.g. "^R pu" (including the space to make it more unique). That's more keypresses than just "gp", but way clearer and more portable since it will work wherever you have Bash, not just where your particular aliases are installed.
You can't rely on muscle memory for history commands as you always need to pause and verify that history found what you were expecting it to find. If your history looked like this (real shell history for me):
git push
ssh ec2-75-101-198-99.compute-1.amazonaws.com
But make sure you've found the command you really thought you were looking for before mashing the return key. Sometimes my muscle memory is a bit too fast...
"\e[A": history-search-backward
"\e[B": history-search-forward
Try it for yourself: type "git stat<Tab>" and it'll autocomplete to "git status".
Then in your bash .profile: source /etc/bash_completion