I was baptized twice...as an adult.
The first time was when I got 'saved' at the age of thirteen. Knowing I didn't want to go to hell, I went forward at the invitation of the service at the Baptist church I went to and was led to a back room where a deacon shared me the Gospel and asked me if I wanted to pray to get saved. So I did, and afetrward was told I could get baptized (full immersion) the next week. Since I witnessed my sister's baptism a few years earlier, I felt it the right thing to do, albeit I didn't quite understand it.
The second time I got baptized was 9 years later at age 22. Let me preface this. I had gotten into a low point in my life and tried various things to improve my life, but nothing seemed to work for me. At the time I was borderline agnostic (mainly because I kinda wanted my own thing). But before I really started spiraling, I turned back to the Lord for forgiveness and mercy and help from the road I was going. In that, I felt an enormous power of forgiveness, release, and love than I'd ever felt in my life, which I attribute as God's acceptance of me, despite myself, and my self-loathing (it's hard to continue hating yourself when someone else loves you more). Anyway, I began looking for a church and I ended up at an Apostolic church (long story). They believe that one not only have to be baptized in full submersion, but that you have to be baptized in Jesus name only (as opposed to the Father, Son, and Holy Ghost as I did in the Baptist church), AND that you have to be baptized in the Holy Spirit with the evidence of speaking in tongues (I was a bit naive then). They took their baptisms so seriously, that when I went under, one of my feet came out of the water, so that had to dunk me again, making sure that no part of my body came out of the water. So in essence, I've been baptized three times.
I eventually made my way back to a Baptist church, but needless to say, I'm done with getting baptized.