CrossRoads:
I am just the opposite - I hate having to jump all over the place trying to find some function to see what is going on.
I find when the functions are sensibly named the whole thing is obvious from a quick read of loop() - for example
void loop() {
readButtons();
flashLeds();
moveServo();
}
Then if I am having trouble I just need to look at the function that is misbehaving.
Undoubtedly there is some overhead in switching between functions but I haven't yet had a project where that "wastage" mattered. In any case the compiler can sometimes be clever enough to generate inline code without calls. I know that because it did it when I didn't want it to.
...R