I started to speak in tongues only because I came into a group of Pentecostals who laid hands on me and told me to "move my lips." I was told to start speaking and just let God give me words in a foreign tongue. Ultimately, it seemed like a deception to me, and rejected it, at least for me.
But I do believe some people are given the gift of tongues. I've experienced revelation that profoundly influenced the way I speak.
I think the bible teaches that not all are given all the gifts of the Spirit, that only some are given the gift of tongues. But those given such gifts should not neglect them, since they are given by the Holy Spirit for a reason. We each have a different need in order to fulfill our destiny.
I once doubted tongues completely, but asked God for a sign from heaven. Immediately a firework went off in the dstance in front of me, above the trees. So I viewed this as an answer from God. Tongues can be real.
Pentecostals, however, have made it into a doctrine that does not square with the Bible. They call it a "Prayer Language" that all Spirit-Baptized belieers should be able to exercise. This goes directly against God's word, as I said.
So it becomes a fake manifestation of the Spirit for many Pentecostals, though they may mean well. I am a Pentecostal--I just don't accept this common Pentecostal doctrine.