Some quick "His Last Vow" thoughts. Spoilers if you haven't seen it yet.
Still love Mary. Shooting Sherlock probably wasn't the best way to get out of the situation, but well, turns out she's a hitman so no wonder her first response to things like this would be shooting someone. She's a lot of things I like in a female character. She's fun, she can kick ass, yet not in a "macho fighting fucktoy" way. She's recognizable as a woman, and not just as a character written as a man then changed into a woman for the screen (a method used rather often because a lot of writers don't know how else to give a female character depth)
Lars Mikkelsen was brilliant as Charles Augustus Magnussen. He played a character whom Holmes despise more than any other person in the world, the closest thing book canon comes to pure evil, and Mikkelsen nailed it. I didn't even want to punch Magnussen in the face because the thought of making any kind of skin to skin contact with him creeped me out.
And finally, I really truly hope that is not the real Moriaty. Please let it be someone using his image. He was a great villain and I like how he is part of Sherlock's mind, but this cheapens his character for me. He had such a great ending. Bringing him back makes this feel like Supernatural to me where death has no consequence and characters seemingly dies left and right and it's just going to turn into one big joke.
Edit: Also, it amuses me that Sherlock has "normal porn interests" because one character was shown to have "no porn interests". He's a character who's sexuality or lack thereof could never truly surprise me, though if he wasn't asexual he was at least in the less sexual end of the spectrum, so everything with his "girlfriend" made me incredibly uncomfortable just because it was a LOT of sexuality he suddenly dumped on us (and John). When it later turned out they never had sex (though some fondling was probably involved if taking showers together was normal) I let out a mental breath I didn't know I had been holding. Supposed that's why I like his "normal porn interests" It seems so mild comparing to what I thought he was getting up to.