Yes. But only when I was quite young.
Was reading SF and fantasy novels before I was 10. Inevitably managed to read a few UFO books, etc, in my hunger to absorb words. I was briefly, aged about 13 - 14, a big fan of Von Daniken and read all his English language books. From the age of 10 upwards I read books on conspiracies, alternative history and archeaology, ghosts, psychic powers, etc, etc, and initially believed it all.
As I read more and more I became more and more "skeptical". This was without exposure to skeptics directly, I worked it out on my own. The evidence didn't stack up and contradicted other "evidence"; the theories were silly and contradicted each other. By the time I was 20 I was pretty-much a skeptic but didn't use the word to describe myself. At the first UnConvention (in 1990?) I was interviewed briefly by a TV crew and described myself as a Fortean. But it wasn't really true, I was interested in forteana, and laughing at the loonies, but I was sceptical.
I was 30+ when I first met Skott Campbell, an Oz skeptic who had moved to the UK, I agreed with him on everything relating to forteana and skepticism. He founded Skeptics in the Pub and I was there at the very first ever meeting.
Several early SitP meetings had discussions about "how you became a skeptic". I was surprised by the people who claim to have been born skeptics. Apparently some skeptics' earliest memories are of not believing in Santa at the age of 4 even though their older sister still did, of going to Sunday School aged 5 and realising that God obviously didn't exist, of debunking urban legends told by their classmates aged 7, etc.