My hybrids are fine - the 21 remains at D3 (I have it set to 39" length) and the 27 has always been C3. I hit both dead straight.
I played with a TM Burner 7 wood before switching to the 910F 19*. I've pretty much established that 41" and a 59.5 lie angle are my fit. I found D2 to be the best overall hitting because I hit it dead straight off the tee and it launches pretty well from the deck. At A2 I have a lower, more penetrating ball flight on the tee but find it hard to hit off the deck. If I use D3 - close to a snap hook. Using C3 gives a similar ball flight as A2 but I tend to have too steep of a downswing and end up chunking it from the deck.
Why would I be getting a higher ball flight with a lower loft? My guess is that a more open clubface does it. Also it is easier to launch it with the lower loft.