What Nail Length Do You Think Is Appropriate?

Personally, I feel like all nail lengths are appropriate for all settings. Nails are a form of expression, in which as long as you can function and appropriately do your job; why should someone else have a say so when it comes to your nail length?

Should a place of employment be able to dictate your nail length? What is your opinion about places of employment being concerned about your nail length due to health and safety reasons?