There have actually been two DC shows I enjoyed. Both were cancelled. The two were Human Target, and Constantine (though I've only seen the latter once - not yet re-watched). I am, as yet, unsure whether I will continue watching Black Lightning. It is, of the current DC shows, the one that is most interesting to me, as the characters themselves are important.
When looking up the work of Matt Ryan on IMdB, it listed him as playing Constantine again in a bunch of episodes of Legends of Tomorrow with last year's season years (2017-2018). He wasn't in last year's episodes, so I looked elsewhere, and found he will be in THIS year's episodes, starting on Oct 22 (IMDB got the years wrong). Since he's in virtually all of the season's episodes, it seems he'll be a regular this season, which means his type of paranormal on the show. So I'll be tuning in to see how that goes.
[I just got the Blu-rays of Constantine today (Amazon finally dropped the price to under $30), so I'll be re-watching his original series starting tonight.]