When I first started rewatching knightmare, I was sucked in by all the old fans saying season 1-3 are the best.
I enjoyed those three seasons, but from season 4 and certainly 5 onwards, the show improved so much.
Season 8 is amazing, and although it uses just a very little too much of CGI, it's still excellent. So much more going on and so better edited and paced.
Classic Season 1 Treyguard with his old rough look and ambiguous side taking is always great though. However I do prefer the assistants he got in. Mejidna was particularly yummy