I'm a Pentecostal Christian. Our practice is a little different from other Protestants in that we believe in Baptism by spiritual fire, rather than water. And I have experienced my spiritual Baptism- it nearly knocked me on my butt it was so intense!
Unfortunately there is a sect of Pentecostals that give a bad impression to other Protestants- they perform rituals involving the improper handling of poisonous snakes around children (tempting God, as it were), so as a result I've had Baptists and Evangelicals give me dirty looks for being a Pentecostal. (We also believe in Speaking in Tongues, which I've also been accused of demon worship with...)
As for my own beliefs, I believe God gave humanity free will for a reason. I can disagree with the practices of my fellow man, but I certainly won't tell them what to do with their life. I also don't like to judge someone for a case of sinning, as it would be hypocritical of me. I'm no pure dove. On the other hand, it irritates me when someone tries to use verses out of the Bible to insult my religion. It's often out of context AND from Old Testament, which no Protestant follows anyway- not to mention mistranslated. I suppose that's fairly common with the internet though- no body checks their sources. XD