How about Sicilian variation for Black, which doesn't require to study a bunch of precise theory, contains a lot of forced variations and at the same time provides a lot of dynamic possibilities with positional flavor? In case you are interested in such an opening "Kalashnikov Sicilian" might be a perfect choice for you! I believe Black has never been doing so well according to current theory, mainly due to relatively new concept in the most challenging variation 6.c4 , Black response 6...g6! so far works great for Black on practice. As always, I dive very deep into all important variations of this opening, offering a lot of improvements for Black. I have no doubts; this material should serve you for many years ahead!