If you aren't feeling it, you aren't feeling it; I have decided I did not like a guy because of his kiss being too sloppy or his looks not being quite right for me, etc. We are mammals and have all that happening as well as our head/heart and all that is mixed in and none is more/less important.

I think you are doing well, knowing you don't want to get back to your old boyfriend because you did not like how he treated you, feeling like the nice guy is "too nice"/smothering (although he reminded me of you texting/calling the rotten truck driver who claimed to be sick when he probably wasn't?). I'm not sure we can find someone who attends when we want and backs off when we want and asks us to marry them when we expect it, etc., you may have to actually focus on the other person and their interests and goals and be interested in them for themselves a bit more?

I like that you are worried about the guy not being stabilized in his career for yourself but I am curious too what that means for the guy, if he is worried or has a plan or what? My husband has been between jobs before but that is meaningless because I trust him and know he is excellent at what he does and that he feels that way about himself and was looking for something specific for himself. My contribution was to try to get him to see I did not care if we lived in a tent (he was more focused on keeping score with how much money he earned) as long as he enjoyed what he did. I think a good relationship means we have to play both sides of the fence; what we want and being aware of what the other wants and wanting them to have/get that, etc.

I would move on though and keep looking, given how you feel about the guys you have described.