I've got a few games going in online chess now with the 1. d4 d5 Tarrasch Defense. I like the Tarrasch quite a bit. Black's bishops are very active and using the IQP is very fun.
In my first game with alexlaw I dropped the Queen pawn early on, which he immediately pointed out so thank you Alex. It made me realize the importance of protecting that IQP.
An equal and fairly open position is available with correct play from black.
If white makes a blunder or mistake black has many attacking peices with good lines available to capitalize. And I will also add it worked well in a live game against a Colle opening by white, as the 3.. c5 pawn push completely throws a Colle player. I've played the Colle a few times and always dreaded the c5 move by black if the attack on e4 is not ready..
strange interpretation of the Dutch Stonewall emerging here. Whatever happened to Bf8-d6 and ..b7-b6, Bc8-b7 and an eventual ...c6-c5!?
Anyway, 1.d4 d5 and a variety of the Queen's Gambit lines will stand the OP in good stead for a long time to come and help improve his chess quicker.