Haters gonna hate!
Boot cut, as in modern style, not the 70s flares LOL! I assume people automatically imagine the latter when someone says boot cut.
Modern boot cuts cover half your shoe/sneakers and looks pretty cool tbh instead of the tip going to the top of the shoes and giving the impression of clown feet
Imagine Steve Job's jeans, that's the kind I'm on about that looks weird!
I would hazard that if that's your complaint with regular / slim cut jeans you try to buy a longer leg. Sadly for the taller gent, average waste sizes and longer legs sizes are tough to get in one package. Even finding 32 (or 30)w/34l can be irritating for me! Or if you are after the casual look, go for regular cut and some high-tops trainers - that seems to be pretty fashionable.
I think boot cut looks casual, but as I get older I think smart looks better and it's rare that boot cut jeans look particularly 'smart'.