Pre or post processing?

I tend to apply filters to my work after I have taken photographs when I get home. My visual problems make it difficult to see small LED screens, and in the light of day it becomes more impossible still

I am enjoying messing around with filters and effects, as the next few images should attest.

I am learning to see my images in a different light, for want of a better phrase, and am beginning to feel that I can bring real creativity to them