I can see why this would happen. I was also in that boat too - a number of the other Pixar movies appealed to me and i saw them but I didn’t see the Toy Story franchise because they seemed like kids movies to me.
But they’re great. Watch them. Ironically the two movies I can recall the entire cinema openly weeping at are both Pixar - the first 5 mins of Up and the last five mins of Toy Story 3