Well this has been no help at all.
Whilst I agree on dressing to the left, I tend to lean my bike against the wall on the left, so the pannier gets in the way.
Oily chain muck is not an issue as it is SS and has a chain guard (so I don’t get my turn ups caught 😉 ) and on the right will make the bike seem wider to cars. Even if it doesn’t have a light/reflectives on it.
Trivial things become such a big decision when unemployed….