If you decide on TNG, make sure to look up viewing guides on TNG (they should be around here somewhere). Like most Star Trek series, they’re off to a bit of a bumpy start, and I’d heavily recommend only watching the last episode of season 1, the five or so highest rated episodes of season 2, and then jumping in fully at season three. You can come back later to rewatch what you missed, but it will make for a much more pleasant start.

Solid advice all around. Man am I glad to be here again!