ok, on the plus side your jacket and tie are both fine, and match very well. unfortunately, the rest of the rig manages to over power the good thing you had going.
the stripes on the shirt are no good, and the collar is floating above your chest. ditch the shirt, and get a solid light blue one with a nice collar.
the PS is just senseless here. it looks like a table cloth, its way to big, and neither its color or texture is coherent with anything else you are wearing. ditch it, and dont even bother replacing it. i know there is a contingency here that firmly believes that without a PS no outfit is complete, but that is not entirely true. the PS requires the deftest touch of the whole rig to do right. when you have the shirt/tie/jacket game down solid, then you can return to the PS if you like. that is just my opinion obviously, but i was given that advise by a well respected member here, and it did me well.
i dont mean to come off as a jerk, im just trying to help you out.
Agreed on all points. I'm not really one for pocket squares, but if I do it's a simple. I don't really know the SF consensus on it, but I usually roll with a square fold barely peaking out white linen PS if I decide to put one in.
EDIT: What awful grammar. I'll leave it alone to remind myself to proof-read once in a while.