Hi, TwoTwoLeft. Congrats on stepping into new territory with your photography as well as your apparent bravery in subjecting yourself to the mercy of the mob in your quest for helpful feedback! This is my first post as I'm new here and I have to say I'm a bit struck by the vitriol unleashed by some on this thread. Surely this isn't representative of most exchanges here. (yikes, I hope not!)
I have no problem with the angle nor the orientation of your photo. If it were me and I wanted to try this angle, I absolutely would do that and then I'd probably try several others as well. Try landscape AND portrait orientation. Try filling the frame with your subject AND giving some space. Try everything you can think of! Then, when you get home and can really take the time to study them on the computer, you'll start to see what works and what doesn't. Shot from slightly below would give this photo an entirely different feel. Not necessarily better, but possibly... or maybe another you try would be the stand out for you.
Another thing, this is absolutely a portrait and not a snapshot because that was your intent. You get to make that determination. This wasn't a snap at a birthday party... you had a specific intent to make a portrait of your girlfriend... at this angle, with these sunglasses, this beautiful golden light and a soft wind through her hair. You know what? Nice job.
As for it not saying anything, nothing of the person coming through, cold expression, etc. Sigh... where to begin? Here's what's coming through to me... here is a beautiful woman with this gorgeous warm light on her face, she has a calm and pensive look further enhanced by the direction of her gaze. My immediate thought was that she was looking out on the water... who hasn't had moments like that? Still, quiet, and looking out on the water as the sun is lowering? I connected with that immediately... sunglasses or no.
Looking forward to your next post!