Congratulations, it is gorgeous, but it does look big on you (which is not necessarily a bad look!)
I have a 55 (and a 45 on the way - yay!), and as I've said to others who have considered getting it - it gets REALLY heavy to lug around when full, and it bumps into everything - and then the shoulder strap always leave nasty marks on my shoulders because again, it gets heavy. Hence I ended up ordering a 45 which I'm also going to use as a gym bag. I really wish I had gone with the 50 or 45 the first time around. If you know that you are a heavy packer or go on longer trips, the 55 might be more practical to keep - after all it is luggage, so it needs to satisfy your needs, but if not, I'd suggest downsizing.