Embroidered jeans are a commitment, not a whim, and the ones that work are the ones where the embroidery knows its place rather than shouting over the whole leg.
The good versions sit the design somewhere specific, along a side seam, around a pocket, trailing up from the hem, so your eye has a route to follow rather than a mess to process. The bad versions scatter flowers from waistband to ankle as if the designer was paid by the stitch, and on a body that stops being a pair of jeans and starts being a pair of curtains. Think about where you actually want the attention to land. A hem detail draws the eye down and makes the shoe matter, a pocket motif keeps things at hip height, which is handy if you're trying to look less, not more, bottom heavy. I own a pair with embroidery that stops dead at the knee, which sounds like an odd place to call time, but it means the lower leg stays plain and the jeans wear like ordinary jeans from the knee down, so the actual trousers still do their job.
They pair best with something that gets out of the way. A plain jumper, a white shirt, a coat with no pattern of its own, because the jeans have already made the decision for the outfit and anything else trying to compete just ends up in a stand off. Over months they age roughly the same as any good denim, slightly softer at the knee and hip, but the embroidery itself is the part that tells on you. Thread pulls, loosens at the edges, and a machine wash on a hot cycle will fray it faster than it frays the denim around it. Turn them inside out, wash them cold, and don't tumble dry unless you fancy watching a flower unravel into a smudge. On colour, a dark indigo or black base with tonal or pale thread wears better over time than a pale wash with bright thread, which shows every mark and every loose stitch like a confession. If you're starting with one pair, go for a design with embroidery in one contained area rather than all over, straight leg or slim rather than anything flared, because a flare adds movement to a design that's already busy and the whole thing starts to look like it's arguing with itself.
Worn under a plain jumper and boots, they'll make the simplest top half in your wardrobe look like you actually thought about it.