Had 4 SS (S0, S2, S3, S5) and 1 Aluminium model (S4).
ALL of them have been in great condition after the year (well S5 is new lol), but the only one with minor (and I mean really minor) nicks was the Aluminium S4. I could only see them if I looked for them. Annoyed me, but no one else would notice - so much so I sold it to a mate to replace his S2, and he was shocked how pristine it was compared to his that was all scratched up.
I don't baby them (no protectors etc), but am aware of my wrist and if I am gardening or doing DIY, I put on a sweat band over the watch to protect it.
Choice is yours, I personally prefer the SS, but if you are upgrading every year, it gets a bit expensive.
Whatever one you get...enjoy
