One thing I have noticed on Mounjaro is a (at least subjectively) significant decrease in impulse spending / buying random crap off Amazon. I have ADHD and that has been a real problem for quite a while - even with ADHD medication (Elvanse/Vyvanse in my case).
The part of Mounjaro that regulates the craving side of the weight loss equation (like reducing 'food noise' and the desire for sugary and fatty foods) seems to also affect other behaviors due to Mounjaro's effect on the brain's reward circuitry. I believe there are also early preliminary studies that indicate it can help with addictions like alcoholism.
Those drugs really are quite something. Shame they're so damn expensive. Insurance here in Germany is unfortunately legally prohibited from covering GLP-1 class drugs for weight loss unless you have a diabetes diagnosis.
On Wegovy(semaglutide) I haven't noticed any change in my binges or impulsiveness. Slightly worse(not dramatic) depressive episodes but that's about it.
One thing I think changed for me was that I switched to WFH full-time and wearing crocs all day. My arches subsequently collapsed. I have joint stiffness now as well, but the x-ray didn't show anything so I think it's perhaps sinus tarsi pain from the compression due to over-pronation.