I think most people prefer to solve one side then the other, but will switch sides for a really lucky case. Often for a lucky pair, its easier to move it out the way to preserve it rather than to have to change sides an extra time. But if its a 2-3 move square, its most probably worth solving right away.
Practise more.
Don't listen to @shadowslice e above. He makes it sound like different people solve differently and need to do different things depending on their solving style to get faster.
Thing is, when I say it like that, it is because to a newer solver, "identify your weaknesses and improve on them" is kind of a catch-22. I mean, even faster solvers will ask what they could improve on every once in a while in case something they thought was good about their solve is actually one of the weaker parts.
Learn OH PLL and drill algs
It's really just a combination of drilling fingertiricks and lookahead. asmallkitten has a good video on YouTube iirc. Also, if you don't do Japanese style (reverse flicks instead of pushes) you should probably switch (though there are occasions where pushing my be better depending on where your hands are. Bottom line is train yourself to move your hands as little as possible to perform each move. Having multiple ways of doing each helps to make sure your hands are never too out of position.
i think it depends on hand size, with bigger hands, pinky D is impossible. the only way to do it for me is using z rotations twice.
I don't like pinky because then I can't do Rs at the same time
I do it like Antoine does.
