You also have pretty decent passing skills, the triangle might work, but you wouldn't be utilizing your ball handlers. I really like the flex offense. I've found that my guards can shoot well out of the 2 position. It may be a tad weak on the offensive boards, but don't have any statistical data to back it up. In the flex, there are instances where you're bringing your big men away from the basket, which could be the cause.
Bottom line, you need good players no matter what O/D you run.