Been browsing B&H lately, which made me a bit curious and brought me to this question...
What equipment do you considering essential to have, what do you feel is non-essential but a good idea to have, and what do you think is luxury equipment (stuff you really really want, but don't necessarily need)?
Any and all gear from filters to batteries to lenses to bodies.
I figure this is a pretty subjective question, and I'm guessing people's idea of what's necessary changes depending on the types of photography they do, so I think the answers might be interesting.