I grew up late 70s and the first 3 kits I remember were all sky blue shorts, and I remember getting the 1985 (I think) home kit (Tony Grealish), which was super pale and had white shorts and feeling disappointed.
Of course over time that's changed and now white shorts seem much more normal, so the sky blue annoys some. I don't mind either tbh and dont really have a preference, but it is very strange that the short colour changes fairly often. I can't think of another top team who does that (I think Spurs sometimes do, but that's stretching the definition of 'top')...
Ps. Didn't like that kit in your pic though. :D