A quick aside: "Post-Crisis" is more accurately described as post-Zero Hour. Basically Zero Hour was an attempt to fix all the continuity errors caused by Crisis on Infinite Earths. Looking at you, Donna Troy, Hawkman, Black Canary, and L.O.S.H. The actual pre-Zero Hour Nightwing suit, which is often mixed up with the OG Discowing, is the one with a mullet. It was designed by "Starfire" (really Mirage, who also rapes him while posing as Starfire), so, besides being everything wrong with the 90s, it's associated with that unpleasantness.
I liked his arkham city look a lot. I always put nightwing in that in knight. Just something about the long emo hair that makes his jokes and awesome personality a nice contrast. Also the suit looks more practical to move in since he's an acrobat
Unpopular opinion the new 52 Nightwing or redwing as I like to call it is not that bad like when he's with the other robins it looked super cool as they all had a black and red color scheme with Damian having some green
Arkham Knight suit was the best imo. It was more tactical and showed more armour while also allowing flexible movements and was overall more realistic.
