The Budapest, or the Benko, I think
aggresive againt 1.d4??

Try the Englund Gambit!
1.d4 e5?!
But don't play the boring lines which try to get the pawn back, and end up with a crap position. After Nc6 Nf3 play ...f6
1.d4 e5?!
2.dxe5 Nc6
3.Nf3 f6?!
4.exf6 Nxf6
And you're off to the races. Black's plan is to play d5, Bd6, Bg4, o-o, Qe7, Rae8, then hopefully sac the exchange on f3 and mate white.

You could try the Albin counter gambit. It leads to open, sharp positions, and is better than the Englund, although I still think black can only dream of getting an equal position if white knows his stuff.
The modern benoni is a great choice, except for the fact that white can easily avoid it. Same goes for the Blumenfeld gambit, you will be cajoled into playing a symmetrical english or Tarrasch if white avoids pushing his pawn to d5. Speaking of the Tarrasch though, it is a good choice if you like playing IQP positions as black, and has the added bonus that it is hard to avoid.
There is also the Gruenfeld, which is quite open and sharp. If you choose this you will have to spend a lot of time learning theory though because it is very topical at high levels.

The QGD Tarrasch variation is aggresive aswell as an open system. And alot more sound than various crappy gambits.

The Modern Benoni is worth a try.
You get murdered in correspondence but that translates to more knowledge in OTB play. You know which lines to steer the opposition away from (whenever possible) and there's a few (similar) stock middle-games you learn to play (usually violent). Of course, Black generally has an endgame advantage, should he survive that long, by dint of the advanced Queen-side pawns.
Send me a personal message if you would like to play an urated game (I'll take Black and am happy to answer questions).
What is a good opening against d4 that draws a lot? I like to be positional(like putting a night on a central square) and play the endgame where I think I am pretty strong. I just want a solid time tested defense to 1.d4 (that I don't have yet) that draws in many lines.

QGD, especially the Lasker variation.
1.d4 d5
2. c4 e6
3. Nc3 Nf6
4.Bg5 Be7
5. Nf3 0-0
6. e3 h6
7. Bh4 Ne4
Most of the QGD variations have a high drawing rate.

I fail to see how the KID is passive....
Its more like the opposite--sound is not the same as passive
Btw, I think 1.d4 e5 2.dxe5 f6 is like a Blackmar Diemar Reversed and certainly Black is at least = if not more in the BDG with good play so, therefore, shouldn't white be wayy better in this? (The normal opening advantage + that pawn) Basically, im saying if Black can defend the BDG and end up at least =, possibly better, given that defending this as white is easier (b/c white is a tempo up here compared to Black in regular BDG), white should certainly end up better right?-just wondering.
I think if you want to gambit, look into the Benko/Blumenfeld or the Budapest.
And im surprised that nobody has mentioned the Dutch yet =O

I would have gone on and on about how good the Leningrad dutch is, but the OP said he wants open positions. Neither the KID nor the Dutch fit this criteria.
Hello :)
i am looking for a while an aggresive daefense against the 1.d4, and i like to play open games... i give some openings i like to play - danish gambit because of the rapid development & attacking soon and the open nature of the game & smith morra gambit... i love to play games that at least few moves in the beginning will be natural to my opponent so i dont have to learn a lot of variations...
i tried the old benoni (1.d4 c5) but it gave me a close game...
KID is very passive and boring (for me)
any suggestions?
thank u!