I like BCE and ACE because it's kind of backward compatible for my brain : You find the same B and A than the previous convention and I like that the CE makes it symmetrical. Common era is also a nice name humanity can get behind whereas my brain never fully accepted Anno Dominus or whatever. If you're going to refer to Christ, do it on both sides the same for Christ's sake !

So parsable, transparent and universal acronyms for the win !