Außer ich oder außer mir?

A. The preposition Other with the Dativ.

• out, except, with, after, from, to + Dativ: All except for have a good note.

B. There are Other but also other compounds, e.g. by-sets, adverbial provisions etc.

• Athat he brushes his teeth, he goes unwashed to work in the morning. / There is nothing good, Other you do. = There is nothing good, Except where: you do.
• Except for food I don’t drink wine.
• Except in good mood he does not sing and dance.