I tend to follow the Smerdon school of thought when it comes openings. The ideal opening is:
1. Difficult to avoid (meaning I get to play it often),
2. Uncommon enough (meaning I will almost surely know it better than my opponent),
3. Tricky enough (meaning it offers the opponent plenty of chances to go wrong),
4. Solid enough (meaning it is not outright refuted and I can still just play chess if my opponent responds perfectly)
Everyone loves the idea of playing black in a Benko Gambit Accepted, but when you realize that less than 7% of your games as black will involve 5.bxa6, I find it is just not worth the time investment.
If I could add one thing to the above list, the fifth criteria would be "rich enough", meaning the opening offers a variety of play even after the same initial moves, as @dRr0x0rZZ said.
1. Difficult to avoid (meaning I get to play it often),
2. Uncommon enough (meaning I will almost surely know it better than my opponent),
3. Tricky enough (meaning it offers the opponent plenty of chances to go wrong),
4. Solid enough (meaning it is not outright refuted and I can still just play chess if my opponent responds perfectly)
Everyone loves the idea of playing black in a Benko Gambit Accepted, but when you realize that less than 7% of your games as black will involve 5.bxa6, I find it is just not worth the time investment.
If I could add one thing to the above list, the fifth criteria would be "rich enough", meaning the opening offers a variety of play even after the same initial moves, as @dRr0x0rZZ said.