The 50mm F/1.4 gets a lot of stick. On average, it gets poor reviews and it doesn't have a great reputation.
Some criticisms can't be disputed ... it's fragile with a lot of plastic internals. It's easy to break. But if you leave the lens hood on all the time (as I do), the risk of destroying the focus mechanism is reduced. I dropped mine onto hard concrete from about 18 inches a couple of months back. The hood took the main impact. No harm done.
There also seems to be a lot of manufacturing variation with reports of serious front or back focusing issues ... or just fairly random focusing errors. But when I MFA'd my lenses a little while back, my 50mm F/1.4 required less adjustment than any other lens (none of my lenses needed much adjustment ... but in the case of the 50/1.4, it really didn't need any adjustment at all). And it performs consistently. I have had no issue with it being slow to capture focus or hunting.
The 50/1.4 vignettes quite a lot on a FF camera but you can either leave that for it's effect or adjust it easily in PP. The issue doesn't arise with a crop camera.
Colour rendition is superb in my opinion and it's perfectly sharp enough for my usage. It's light and (even with the hood fitted) reasonably small.
So ... I really like my 50/1.4 and I shoot with it a lot, especially for portraits on a crop sensor. And I'm not going to change my opinion of it because majority opinion differs from my own views/experience.
But you are going to hear more bad than good about this lens. It's perfectly possible that I am right (lucky to have a really good copy) and the majority are right as well (most copies are not very good). In which case, if I were you, I'd probably go with majority opinion.
Comment and (constructive) criticism always welcome.