Going full no-guard is an absolute delight, like having a furry pet on your head whenever you need a comforting stroke. Full bald ie razor-shaved is an interesting experience, making your head feel a bit like a hard-boiled egg, but worth a go from time to time, particularly when your shaver dies halfway through doing your head. But in both cases be steeled for the first time you bang your head on something, because there is no pain like it.
I often let mine grow out to a couple of centimetres, compared to which Statham looks positively dapper, but I’m a middle-aged absent-minded professor in waiting so I couldn’t give less of a shit about looking like a tramp.