I realise that opening bids are getting lighter and lighter, and this hand is 13 High Card Points on a basic point count but looks awful around the edges. I had a number of options available I felt, and third in hand with a passed partner allowed me a bit more leeway than usual.
As the opponents only had a natural defence to a 1NT opener (suits natural, double 16+) I decided to do something I rarely do "psyche", with the favourable vulnerability and opened 1NT (weak). (You are welcome to criticise me freely for such a rash opening) But my thinking was based on that my partner (who rarely opens a 11 count himself) wouldn't push us towards game, and I could pass a Stayman enquiry (but goodness knows what I would have done if partner used a transfer!). And as we use three weak two openings, he certainly wouldn't have a six card suit and a weak hand in ♦/♥/♠.
I am curious as to what you feel the best bid is, given the position and vulnerability, and as always thank you for your replies.