Camera Filters (CT14)

Hi All
I'm trying to dig up my photography hobby from its resting place and would be very grateful for any filters you have to experiment with.
If I'm successful, I'll post up any photos I take so you can see the end result.

I'm interested in any and all filters.
My camera is 67mm, but any size would be fine as I can easily get an adaptor to fit.

Thanks for reading.....
Steve