How are
ConceptionII: Children of the Seven Stars
Toukiden: The Age of Demons
Worth picking up on the vita?
Toukiden is a really good game.
If you like MonHun it's similar combat wise. It doesn't have as many subsystems so the learning curve isn't as huge. The game has a nice story, good monster designs (12 + 12 re-colours, keep in mind is the first game in the series, it doesn't have 10 years of previous entries like MH), a good story and the Mitama system is really good.
The Mitama's are the spirits of most important Japanese warriors. They give you different passive boost, you can level up them (so you get more boosts) and there are 7 different types: Strength, Speed, Defense, Healing, Poisons, Spirit (Magic), Space (I don't understand this one XD) and Luck. Each one has a set of 4 active skills (3 different for each type + Recovery, a healing skill, common for all of them). Your weapons have slots to equip Mitamas (1 main slot that determines your skills and extra for the pasive boosts).
There are 6 types of weapons, some faster and some slower like in all this games.
The game is awesome. I won't spend as many time explaining it if I didn't like it. I've played 50 hours so far and I still have stuff left. I stopped playing for a while but I started again a few days ago. A must buy if you're a Vita owner.