 If you liked Tactics |  ...then you might like Zoku Natsume Yuujinchou |
Tactics is really similar to NY because they both relate main characters that had gone through a rough time in their childhood, but now they have friends. Tactics is a little bit gloomier, thought. Both, Kantarou & Natsume, have youkai as their friends and also as their servants. Both of them have great spiritual power, but are too soft.