Against c4, I prefer the Reversed Sicilian setups, including the Reversed Dragon and Reversed Rossolimo. I have dabbled with the Symmetrical English, but not done anywhere near enough reading or research to consider playing it on a regular basis.
Why do non-e4 players play 1. . .e5 against 1. c4? In your case, is it because you're a Sicilian player, so you're aware of white's setup?
i like playing bird's, king's gambit, icelandic gambit... i like the dutch too