The only problem with wearing polish all the time is it stains your nails.
The first time I wore fake nails was for a friend's wedding. They tore up my real, bitten nails underneath. After my nails grew back where they weren't bumpy, I stopped biting them.
On a different note, what nail length is too long? I saw a lady whose nails were so long, her pinky nail was curling. I find long, talon-like nails gross. Especially when they start to curl. And really long acrylics? Not a fan of those either. Don't take offense ladies if you like them really long, it's just an opinion!