We don’t have a lot of choices here so we use Sherwin-Williams paints. It’s either that or Valspar from Lowe’s so it’s Sherwin-Williams.
For exterior, we generally use the Superpaint and I’ve grown to like it. It’s pretty good stuff. Painted some today as a matter of fact.
Another lumber yard in town carries Porter but they won’t cut us any deals.
I really like Porter paints though. Always had good luck with them. Their old Silken Touch line was some of the best paint I’ve ever painted and some of the most expensive too.