I agree that flamewars about editors are not interesting, so I won't say too much, other than: For SSH'ing, another editor which is (nearly) always there, and

I agree that flamewars about editors are not interesting, so I won't say too much, other than: For SSH'ing, another editor which is (nearly) always there, and which I find convenient, is nano - and it displays its common shortcuts at the bottom, so you don't have to learn anything. I still use nano, even on my mac locally, to edit the odd file quickly in the terminal.