You may call me old fashioned, but I like the classic cheatline liveries. The Air China and China Southern ones are properly designed with subtlety and balance, and stands well to the test of time. Could they be updated with a more modern touch? Definitely. But I worry more about them losing all the good old bits (e.g. the fonts of Air China) and getting replaced by a shitty new age "bold and simple" one like many airlines are doing nowadays. Look at the new livery of China Eastern, Japan Airlines, LATAM etc., they may look fresh at first sight but there is no taste, no style, just cost-saving light paint and in-your-face text+logo branding, people will get tired of it easily.
Military paintjobs should be discussed separately. Some of the old ones are pretty bad (prime example include Chengdu factory paintjob of the JF-17) but IMO the newer paintjobs on all the grey nose J-10/11/15/16 and the "white-cloud belly" paintjob on the larger aircraft are not bad to look at. Not to mention experimental paintjob on prototypes like J-20.