I think I've left feedback for most of my transactions. I see it as a common courtesy. But I think if you really want it so badly you should request it via PM when sending the knife. I've had one seller request feedback and I gladly obliged, I think if I had a neutral (smooth but not particularly friendly) transaction I would just wait and see if they wanted feedback.
That being said, I don't like how the new forum makes you copy+paste the sales URL, when the old forum auto-filled it when you clicked Rate Seller. I do alot of my browsing on mobile and it's a pain to search my posts for the sales thread and then copy+paste. A minor grievance in the grand scheme of things, but I thought I'd provide feedback while we were in the subject.
That being said, I don't like how the new forum makes you copy+paste the sales URL, when the old forum auto-filled it when you clicked Rate Seller. I do alot of my browsing on mobile and it's a pain to search my posts for the sales thread and then copy+paste. A minor grievance in the grand scheme of things, but I thought I'd provide feedback while we were in the subject.