Alarplasty? Weir Incision? Or Base Reduction? (photo)

Personally, I think your nose is cute and I would not advise getting Weir Incisions.  A rough guideline for normal width of the nostrils is the distance between the eyes - for you, they are about equal.

Usually when patients refer to their nose as a "pig snout", it means they feel their tip is too upturned (over-rotated).  This could be corrected with a septal extension graft without modifying your alar bases at all.  

The width of your nostrils is proportional to your facial features.  If your goal is to reduce the amount of nostril show and make your nose look less like a "pig snout", then I would recommend lengthening your nose slightly by counter-rotating the tip with something like a septal extension graft rather than performing alar base modification.  

Your face is attractive and the nose is overall in good harmony with your face. You'll benefit most from a narrower nasal tip, reinforcement of the tip cartilage so it doesn't widen when smiling, and possibly reshaping the roundness of the nostrils but altering the internal cartilage (rather than removal of skin). Sharper photos and standard views will help immensely.