Wow. What the hell are you going to do when you actually get to use a truly great lens as opposed to this rather middle of the pack 50mm lens that has honestly not a single distinguishing "great" image quality aspect - the only thing one can truly say about it is that it can be had dirt cheap.
But let's now get REAL and talk about the reality of where it truly sits when we speak of image quality.
1) All 50mm lenses are pretty sharp stopped down a bit. Pretty basic, classic design that has been around for several decades. I'm not sure I've ever seen a "bad" 50mm lens, from anyone, in over 50 years, if one shoots it at mid apertures.
2) That being said, there are differences among them. Of the most magnitude, in wide open (or near wide open) performance, absolutely. Most definitely in bokeh quality, and yes, even resolution stopped down. The 50/1.8 AFD is mid pack at best wide open - there's a long list of lenses quite a bit better wide open or near it, including both more modern G variants (50/1.8G, 50/1.4G), the Tamron 45, and lenses that absolutely destroy it image quality wise anywhere near wide open (and happen also to be sharper stopped down) like the Sigma 50/1.4 art, Zeiss 50/1.4 Milvus, and certainly the Zeiss Otus 55. If we change gears over to bokeh, the original Sigma 50/1.4, the Zeiss Milvus, the Nikon 58/1.4, honestly the 50/1.4G even, and probably the Tamron 45 as well all have (far) better bokeh than the 50/1.8D. Ain't lookin too good for your 50/1.8D to be considered anywhere near 4.5 stars now, frankly, if one has actually *used* a wide enough set of lenses to have an opinion.
3) And the big winner, the reason I can't recommend this lens - to anyone - even thought it's cheap: There are three known (as in, are facts, not opinions) Nikon older AF/AF-D lenses with design flaws due to them being designed prior to the advent of the digital camera. The 50/1.8 AF/D, 50/1.4 AF/D, and the 85/1.8 AF/D. What happens is that if you shoot any of these three lenses at F/10 or higher in scenes with bright backgrounds, you'll get a whitish ghost-like artifact of the aperture blades reflection in the center. It will ruin shots. I've had it happen with, oh, all three of these lenses, and (besides their rather mid pack optical performance) is the reason I sold them.
4.5 stars? Not even close. I couldn't give it 2, and the artifact issue alone means I wouldn't recommend to anyone, at any price.
Please try to have some real experience with lenses before you go off in this forum about some average performing mid pack 50 that has the potential to ruin somebodies images should they mistakenly put any weight into your sorry "review". Seriously.
Disclaimer #1: I've used all lenses in this discussion.
Disclaimer #2: If it wasn't for point 3 in my response, I wouldn't have replied to you. But given this lens is unfortunately one of the few that actually CAN ruin an image for someone, the truth and reality about this lens must be mentioned so other readers don't make a serious mistake and buy it. That's why I'm so harsh and blunt.
-m