I'm not much of a Ninja Theory fan either. I agree that all their games are wanting in the gameplay department, and are generally only lauded for successes in other, less important (to me, anyway), areas.
Although you don't care for her, I thought Nariko was a decent character, and that part at the end when you're wrecking loads of dudes is pretty alright.
Enslaved has some excellent performance capture, but Uncharted 2: Among Thieves had already set the bar higher when this game first released. World design is pretty, I guess.
I wasn't too thrilled when DMC brought back Heavenly Sword's on-the-fly stance/weapon changes. I feel that alternating between the R2/L2 buttons throws off the balance of the controller in my hands and makes it difficult for me to pull off combos that I never would have had issues with in previous Devil May Cry games. Some of the levels looked cool, I guess, but I couldn't even bring myself to finish this game and see them all.
So the only consistently good element to their games is that they look good... except they kind of don't. All their games have this hideous grimy grain filter that just makes them look unfinished. They look the way games look in crummy GameStop machinima commercials.