I like the old TOS with its campiness, but even when TNG was new I found it unwatchable.
In general, though, TV shows don't age well. Even Mission Impossible from the 60's, well regarded at the time, looks silly today.
When we rewatched Stargate SG1 just a few years ago, i was surprised how good it still is.
Try the Best of Both Worlds two-parter.
I like the old TOS with its campiness, but even when TNG was new I found it unwatchable.
In general, though, TV shows don't age well. Even Mission Impossible from the 60's, well regarded at the time, looks silly today.