Yea, I have every episode of Doctor, including DVD-Rs of the recons from Youtube downloads, I was speaking more to the feeling at the time when they were shown, rather than looking back on them from today's world. (Wether at the time they were considered more serious then we tend to see them looking back on them now)
I first saw
Genesis of the Daleks in the early '80s. I loved that story, and still think it's one of the best of all the Doctor Who stories.
Crossovers... well, there was a really ridiculous
Tomorrow People story called "A Man For Emily." Peter Davison played an alien named Elmer (the aliens mistook the TV westerns whose signals they intercepted as indicators of normal Earth culture). Elmer's family came to Earth because they were searching for a new home, and because "Emily" (Elmer's sister) needed a mate. Naturally, they decided John was the perfect candidate.
Peter Davison's wife, Sandra Dickinson (Trillian in
Hitchhiker's Guide to the Galaxy), played Emily.
So a Doctor Who/Tomorrow People/Hitchhiker's Guide to the Galaxy could have been one heckuva weird crossover...
I had an old Doctor Who print 'zine called
Traveling Companion, and one issue was all crossovers. There was Doctor Who/M*A*S*H* (the Fourth Doctor and Leela drop into the 4077th), Doctor Who/Remington Steele, Doctor Who/Star Trek (of course!)... but one of my favorites was Doctor Who/All Creatures Great and Small. The Doctor, Nyssa, and Tegan arrive on Earth in a peaceful country region, and the Doctor decides to go for a walk. But he doesn't get very far before someone runs up to him, calls him "Doctor Tristan Farnon" (the character Davison played on that show) and tells him to get over to a nearby farm to deliver a calf!