My biggest impediment to the forward bend? My hamstrings. When stretching with my back flat in a cold stretch, I could only get to about 90 degrees (Sad, I know). I've made some good progress and it doesn't hurt to stretch anymore...I'm down to mild discomfort.
On the side split, I actually enjoy that one now. Groin is still tight, but I'm noticing some positive impact when rolling already.