He simply doesn't like doing it. Because he already has issues with being different. He can't get much more different from the human race than flying without being propelled by anything can he?
He doesn't like being different - agreed. But either way if they don't see him running at superspeed, they aren't going to see him flying at that speed anyway. That's not the reason. And yes he has done it at times before AND after being Kal-el. (Floating in bed while dreaming of Lana. Sleep "flying" when being awakened by Lex's porsche in the middle of the road, etc etc).
As for all this jump talk, think about it for a minute, how would anyone takeoff to fly, most of the time with a jump. Thou occasionally by hovering first.
You have a point. As we've seen from the shows on TV with persons being able to fly, they usually jump first. Although if it were me, I'd definitely hover first. It looks so cool.
He flew again when he had to stop the missiles from detonating.
No, he jumped. That's why he jumped and started sliding down the rocket (or the rocket kept going and he wasn't going up anymore). Whatever your frame of reference, he jumped. And as for him falling back to Earth, yeah, that's how I imagine it. Although I do believe, as I've stated before, that his power's are Psionic, therefore he has control over his body and where it goes.
He didn't chase J'onn because 1 he was startled. 2 what would he say? 3 dude just wasted someone that was literally manhandling him.
1) I don't care how startled you are, you're going to chase after him. He's done it before (being startled and then asking questions right away). 2) What/who are you? Why'd you kill him/Save my life? Where are you from? All questions he's asked when strange occurances happen on the show. 3)I'm sure if Clark wasn't an idiot he could've handled that guy, the fact of the matter is that the writers don't let Clark use his brain. Not to mention that fact you said in your 3rd statement - he obviously has no problem with Clark AND was looking out for him since he did that.
Plus the writers and producers of Smallville feel doing it brings him to close to Superman and not Clark. Which is what the show is about. CLARK not Superman!!!
Actually I thought the whole show was about Clark becoming Superman. His journey to that...