i wish foobar and its extensions were a bit more flexible. seems like when you build a skin you eventually have to sacrifice both form and function.
for example you can't script buttons to maximize/minimize/close the window, so you're forced to keep the stock buttons, window title and border.
never found a way to increase the functional area of a volume bar, so let's say the volume bar has its own panel and a lot of empty space around it. though it'd be nice to be able to control volume by scrolling anywhere over said empty area, it will only work by clicking on it to focus and using the wheel to scroll up and down directly on top of it.
then there's the fact that a lot of components are really outdated, known to be buggy, and aren't very complete. the foo_title component won't let you pass any 'Plain/Menu/Commands' to foobar which really limits its potential usefulness. only the standard commands play, stop, next etc.