Regardless of your 1N opening range (I play both weak 12-14 and strong 15-17 depending on partner) I have been persuaded to bid 1♠ over 1♥. Reason is a killer missing a 4-4 ♠ fit especially in MP. Here p will fairly often not be able to checkback. Also may encourage p to bid 2N or 3N knowing ♠ is stopped. As to 2N, that can bypass a ♠ suit as p will almost always be able to check back. Also, it right sides any NT contract which is much more likely after a 2N rebid.