DS9: probably the best scripted of all the series
Enterprise: might have had all kinds of errors and gubbins going on but i enjoyed it. I did like the Andorians and the Gorn. But it still didn't explain the Kilingons going all human looking or did i miss an ep
Voyager: i liked it but the ending let it down what happened to the crew after making it back to earth. Was it wrong to ask to see a bit of crew elation and reuniting with their families and friends.
TOS: its the original i can't grumble it was made well over 30 years ago and no i'm not gonna hunt the remastered stuff down its nostalgic.
TNG: IMO it was political correctness on over drive no we can't fire on them we might chip their paint work