I have the blue 3DS XL. Bought it just a few days ago too. My hands are pretty big and the bigger screen sizes were very nice and was said to even amp the 3D abilities so money well spent.
I have the XL. After playing with both for a while now, I honestly feel like the larger screen is just so much better. Pixel scaling really isn't that large of an issue so I'm surprised at the people who think it retracts from the gameplay . Would prolly never go back to the standard one after getting used to the larger screen.
I used to own a Red and Black 3DS XL, but I sold it to get the Animal Crossing one. With the standard 3DS, it used to get almost always smudged and I got tons of scratches.
Standard. The look of the 3DS standard models will always appeal to me more then bigger screens. I just love the way the standard 3DS looks. Like 3 shades of the colour you chose.