Have you checked your lumber moisture content? Wood that's too wet or unevenly dried can warp on you pretty quick...but yeah, reclaimed wood definitely has its charm—imperfections and all. Sometimes straight-ish is good enough, right?
Checking moisture content is definitely a step worth taking—especially if you're using reclaimed lumber. I've found that even wood that's been drying for ages can still have hidden pockets of moisture that cause headaches down the line. Last summer, I built a small shed using some reclaimed barn wood. Thought it was bone dry at first glance, but a few boards twisted noticeably after installation. Lesson learned, I guess.
On the other hand, I do think there's something appealing about walls or structures that aren't perfectly straight. A slight bow or curve can add character, particularly in rustic or farmhouse-style builds. But there's a fine line between charming imperfections and structural headaches...straight-ish can quickly turn into crooked-as-heck if you're not careful.
I'm curious—have you noticed any particular wood species being more prone to warping than others? I've heard mixed things about pine versus hardwoods in terms of stability. Would be interesting to hear your experiences with different lumber types and how they behaved over time.
