I'd have Seasons 1 & 2 over 6 & 7 every time
Some great pure sci-fi cheese in S1&2 - pure Roddenberry Trek and I enjoy it - thoroughly entertaining
Sure there are some stinkers mixed in but I don't have to watch those do I
S1 and 2 focused more on action & adventure rather than the calm, controlled, formal, dialogue driven, technobabble bloated 'Berman Trek' TNG turned into at the end - Seasons 1 and 2 are much more fun!
I love Season 6. That to me is when it felt like the writers really started to have some fun
with the show. Whether it was bringing back Scotty, turning the crew into little kids, making Worf a cowboy, turning Troi into a Romulan, or letting Q be Picard's guide in the afterlife.
Maybe all that was too cute and gimmicky for some fans, but I enjoyed the heck out of it.