This is such a FUN post! 
For my only-5 LV pieces, they have got to be:
1. Twist Epi with chain strap (haven't owned one as still waiting for the right colour)
2. Alma PM size in Pomme d' Amour
3. Pochette Metis in Reverse Mono
4. Papillon Trunk in Mono
5. Neverfull in DE (such a workhorse!)

For my only-5 LV pieces, they have got to be:
1. Twist Epi with chain strap (haven't owned one as still waiting for the right colour)
2. Alma PM size in Pomme d' Amour
3. Pochette Metis in Reverse Mono
4. Papillon Trunk in Mono
5. Neverfull in DE (such a workhorse!)