Meh. Overrated as hell. Most of the characters are unlikeable and boring with little to no depth. It'll fill your Yoko Taro shaped hole for a while, but I am not interested in returning to it.
While I love SH, I like SH2. The story is hard to follow and the combat is even worse. The characters have more development than in SH, but the ridiculous voice acting can change the tone of some scenes. Still I would argue that it's a must play for most people.
SH3 follows the cultish storyline from 1 and hits similar story peaks with greater gameplay. Voice-acting has been dramatically improved from 1 and 2 and everything has been tuned. The bosses suck but I managed to beat them so can you!