That was planned. Remember, he did research and planned to go to the restaurant, because he was trying to get Jones to appear at his convention. Everything about the night was spontaneous, only because Jones did it, Sheldon didn't suggest anything they did and if you remember, Sheldon wasn't happy with some of those choices.
This one, I'll agree with.
Planned, to spite the others.
Only because he wasn't himself. In both cases he was under duress (Lack of his haircut and trying to replace Amy, respectively).
Planned, as a way to relieve his brain from thinking about the graphene sheets.
Offered to be a part of something he loved is not really spontaneous. It was to his advantage.
If so, then please explain his lining up his cereal by fiber content. Or, his wearing of pajamas on certain days. Or having specific meal nights. Or his fixation on doing his laundry on Saturday, or his three knocks. Or, to bring back the bongos, his inability to have his hair cut by anyone other than Mr Denofrio. Or, perhaps his insistence on have the thermometer set at a particular temperature. Or, how about planning out everything about the trip to Sweden? Maybe you could also explain his aversion to any change in his routine. All those indicate he lives a rather planned, rigid, life.
You mean like when they went shooting (and Leonard shot himself), or the farmer's market, or when they went to get a Christmas tree. or the Valentine's day episodes. See, there are enough examples and counter examples to make anyone's point. In general, Leonard and Penny didn't do much of anything, simply because the writers chose not to (or they were unable to ) write anything more than that for them. Writing something funny for a narcissistic, pain-in-the ass, is much easier than trying to actually write something about a regular run of the mill couple. I don't like, to watch narcissistic, pain-in-the ass, people, hurt their friends. It's understandable when the person is doing it, without knowing they are hurting others. But, by the latter half of the show Sheldon definitely knew he was hurting them, and yet he continued. Making him nothing more than a jerk. That the others stood by him, and only occasionally lashing out back at him, says much more about their love and understanding of his problems, than anything he can do.
What's interesting to me, is that many of his supporters talk about his having Asperger's, and point to the depiction of his scheduled, rigid life. Yet, those same supports say nothing about his being narcissistic, where one of the key points in describing a narcissist is: a mental condition in which people have an inflated sense of their own importance, a deep need for excessive attention and admiration, and a lack of empathy for others. Sounds a lot like Sheldon.