"My favorite Martian" was indeed a funny and enjoyable show. But they were aiming for funny. "Lost in Space," I think, was trying to take itself seriously. It only really works as low camp material. Remember it was the same time as "Star Trek" which was so far in advance of "Lost in Space" both scientifically and in story telling there is really no comparison. Both did suffer from the available level of special effects. I could overlook them for "Star Trek" but not for "Lost in Space." By today's standards they are awful, but fairly cutting edge for 1965-67.