I saw that topic about "what do people play after 1. d4?", and I got curious about what people answer to 1. c4.

Post here your move after 1. c4.

I'll start:

After 1. c4 I play 1. ... e5, because I think the following moves are easy to guess, as they are quite obvious.

1...c5,1...e5,or 1...Nf3.

Probably you have the most played reaction of Black. But there are several possibilities on c4. Like I said in http://www.chess.com/forum/view/chess-openings/jaenisch-gambit-on-c4 I come with b5. The Jaenisch Gambit.

I play 1...f5 against 1. c4, trying to veer the lines into Dutch territory.  You may consider the Classical Dutch lines - they are pretty fun to play!

Mostly I play 1. ... c5, the idea that White will usually play 2. Nc3 or 2. g3 and I follow with 2. ... e6 and then with 3. ... d5 trying to get White to transpose (by playing d4) and play against a Tarrasch Defense. Basically I am praying my English playing opponent won't know the Tarrasch as well as I know it. If White doesn't transpose I usually get equality or just a slightly worse position.  If I need to win, then I usually will play 1. c4 e5 and end up with a reversed Sicilian, a much more difficult proposition for Black.

When I play as white I mostly start with C4 and I don't care what my opponent will answer except one move: 1 ... C5 I hate Symmetrical! 

i hate c5 too!!!!!!!!!!!

I play the symmetrical.

1...nf6.      1c4 is the english opening.

Well, I play the symmetrical because I play the english as white too and therefore am very comfortable in english - y positions for black!

I play several moves after 1. c4:

Oh and I forgot:

1... g6 or 1... e5

d5.

I have played 1...c5 for a while, going for a botvinnik set-up most of the time. I find that the positions are often too symmetrical for my taste though and get boring. Therefor I am switching to 1...f5, since that will be my new defence against d4, I might aswell get more practice with it by using it against other openings aswell.

I don't like c4! e4 is the only way forwards

I play 1... c6 hoping that white will play 2. d4 and then I will play 2... d5 transposing to the slav.

e5,or c5

I play the reversed closed sicilian, as that is what I play as white against the Sicilian.

I like b6 and e6 (note, and, not or)