Recent discoveries for me, here.
Things I can do with my new fingernails on:-
1)  Scratch other people's scalps.  (why do men like that?)
2)  Point.
3)  Er...
4)  That's it.
Things I cannot do with my new fingernails on:-
1)  Type.
2)  Put on make-up.
3)  Take my contact lenses out.
4)  Put my contact lenses in.
5)  Do up buttons.
6)  Wash up.
7)  Make pastry.
8)  Put on stockings.
9)  Use a pen.
10) Pick my nose.
I'm sure there will be more, but I'll possibly add to the list as the day goes on.  I do like to keep you informed.  
      The one and only time I tried them I had one hell of a job pulling my knickers up without them pinging off so I would recommend going commando to avoid this problem  :twisted:  
      Add to the list: scratching your ear.  I scratched my ear last night and even my real nail must've been too long because it started bleeding - EWWWW!  
      Aside form having trouble with earing backs - having long nails doesn't stop me doing anything.....
well sticking your finger up a guys bum might cause a debate - I say it doesn't stop me from being able to - he on the other hand may disagree!  :shock:  
      thats very considerate of you Polo. And still sounds like fun