My Dad always started hundreds of tomatoes and shared them with family & friends. He seemed to have a real knack for great tomatoes. Since he always gave me a bunch of seedlings, I never started any from seed. Now that he has passed on, I had to start my own tomatoes.
The 1st few years, I tried some Hybrids that were more suited for Northern climates. My neighbor had requested some Heirlooms and wow, did that change things. Now I start over 25 varieties and really enjoy the huge selection.
I start them indoors, in March, starting with the late maturing ones since our growing season is quite short.