I've grown fond of sideways exercises lately, though I really can't say why. They make for nice warm-ups, since they generally require a lot of shoulder and hip ROM in addition to spine stabilization. Bent pressing, TGU's, double get-ups, one-arm OHS, suitcase dead lifts, and windmills, all with a barbell, are fun. 360-degree hanging leg raises, windshield wipers and one-arm hanging leg raises are also good ones if you're more into the bodyweight stuff.
And yes, I'm actually holding that handstand. Get on my level.