My favorite TV show from my childhood would definitely be Drake & Josh. This show was on Nickelodeon like 12-15 years ago, and it was a classic. When I was around ten years old, everyone that I knew was watching it.
It has to be either Scooby Doo or Spongebob Squarepants. In terms of Scooby Doo, I have to say that I loved the episodes that were shown when I was younger as the newer ones aren't as great and just seem a bit weird. Spongebob is obviously another great especially considering people of all ages can love that show
With so many great shows, it's challenging just to pick one. It has to be either Futurama or Spongebob Squarepants. After some time, there was a lot of repeats so I stopped watching them over time. I can remember playing this musical from Spongebob Squarepants every Christmas Day as a child.
I had a lot of favourite tv shows as a child, they were mainly proper animated tv-shows such as fireman sam and bob the builder. This was long before they were ruined in the modern era with CGI though. I do not understand why we can't just have our great tv shows in the past without trying to spoil their legacy by changing them.