I know I want a nose job, but I don't want to make my nose too small, advice?

The rhinop[lasty consultation will be extremely important for you to make sure that your surgeon knows EVERYTHING you are bothered by and that all of your concerns are addressed. If you came to me, this is what I would tell you:
1) we can absolutely tailor the size of the nose to match your face and/or what you want2) the space between your nose and mouth looks a little off because you appear to have a retruded maxilla so it's almost as if everything is tucked inward... this is not something that is easily fixable other than considering an intense jaw surgery, but a possible option could be some very deep fat grafting/augmentation of your maxilla. this is also why you might think you have a hanging columella but yours is actually not too bad.3) the bulbous tip can absolutely be refined4) for pic #4- everyone has facial asymmetry and one side smaller, this is likely why you note that things seem to be tilting toward your left side5) everyone's nose widens when smiling- this is because your smile muscles partially attach to your nose. This will never be changed; however, it can be somewhat reduced by doing alarplasty surgery to reduce the width of the nostrils in general. You have to be realistic about how much of an effect this will do because like I said, even afterward, your nose will still widen when smiling.6) you can absolutely get the tip dropping when smiling corrected too with rhinoplasty

Rhinoplasty can enhance nasal shape and profile according to the wish of patient and surgeon suggestions.It is better for you to consult with a facial plastic surgeon who can examine you and discuss the surgical procedure and the post op recovery
process.

The dorsum of your nose is concave and you will need cartilage graft to create a more straight dorsum. The tip needs to be redefined as well and the angle needs to come up a little bit. Your nose is leaning towards one side that needs to be corrected as well.

Best Wishes,

Gary Horndeski, M.D.

If you have severe dissatisfaction with the appearance of the lower 1/3 of your nose, Rhinoplasty involving the lower 1/3 of your nose maybe considered, depending on your examination. Please consider meeting with several reputable rhinoplasty specialists who offer computer Imaging so you could understand what to expect moving forward. I hope this is helpful! Sincerely, Dr Joseph

A rhinoplasty to narrow your tip and reduce your infratip lobule would give you a nice result. It is mostly the tip that is of concern.