Hey Caroline! 🙂
If I’m printing I usually bring the photo in to Photoshop and just apply another round of Unsharp Mask or Smart Sharpen (both are pretty close) to the photo so it visibly looks over sharpened on screen. That usually products a really great looking print, but not something I’d share online, because it usually has a few halos and sharpening artifacts (that will get smoothed out in the print). But you and Tony are right. The photos are so sharp these days that they don’t require the sharpening we used to need. If it’s sharp coming out of the camera, you could do nothing and the print would still look great. And if it’s not sharp coming out of the camera, I don’t think any sharpening tool will make it look sharp (and realistic).