TNG took awhile to settle in, as I believe is the case with all the spin-offs. I recall that, when it first came out, I didn't care for the exterior of the ship. (I thought it looked like a flounder.) I also missed having a science station, communications station, etc., on the bridge. Troi and her "I'm sensing" spiel got pretty old pretty fast.
I was very impressed with TNG's greater budget.
I like both series.