I think it is important to understand what makes a style actually different and what is just semantics. For instance, if you write a function to do some operat

I think it is important to understand what makes a style actually different and what is just semantics. For instance, if you write a function to do some operation on an object, you could have written that as a method instead. But ultimately it is the same code, it is unlikely that the difference matters much for either performance or readability. However if you need to do some operation on a bunch of objects you could pack each operation on the individual objects in a method, and call those methods from a main function. Or you could just put it all in one function, with as many nested loops and if statements as there needs to be. Now the difference is real, you pay in performance for a lot of function calls, and following the control flow is different. Personally I tend to prefer the one function, but sometimes part of it makes sense as its own function, in particular when I can avoid duplication that way. There is no silver bullet, but best of luck, changing one's style can be hard.