For my first pair, I used Kenneth King's Jeanius craftsy class to rub a pattern from an existing pair of jeans. Here is the result.
I chose jeans to copy that are higher in the back than the front, as this is a feature I like, but one that I have never been too confident in making to existing patterns.
I bought this printed denim about 15 years ago in Adelaide. I thought it was funky, then decided it was too funky for me and didn't sew it up. It is a stretch denim, which I thought would be great for a muslin, because it seems silly to use calico to muslin a stretch garment. Turns out, I like the finished jeans and have worn them several times already. My kids have given them the thumbs up as well. The benefit of the print is that you can't see where I have taken a huge dart out of the yoke...they are a muslin after all. I left the pockets pretty plain, as topstitching hardly shows either, and I left off the belt loops out of laziness, at the time thinking that I would not wear these.
There are some under butt wrinkles, but 5 pairs on and I still have not resolved that problem. Some pairs are better than others. When I think about, it seems ridiculous to try and fit flat fabric smoothly around a butt curve, when we employ darts for bust curves. Jeans with butt darts...you heard it here first!!
My biggest problem, fit wise, with this pair is wrinkles behind the knee, due to what I consider normal calves, but others refer to as hyper-extended calves. The fabric has softened now, but the wrinkles were stiff enough to actually be annoying on the first wearing. A quick dip into my fitting book suggested scooping out the crotch curve more, I guess so that there is less fabric from crotch to knee and the fabric behind the knee is pulled upwards, reducing wrinkles. I have scooped out the crotch on subsequent pairs, which has helped with the behind the knee wrinkles, but may have caused other problems.
Overall, I am pretty happy with pattern and how these turned out.