Kenya,
That's a hard one for me, remember I grew up in churches that didn't believe in tongues. God dropped me in the middle of a pentecostal church and I had to deal with it (at the time I could have given you a list of verses saying it was wrong

) I had to get over my tradition quick because I could feel God's presence and knew it was me that had to change.
I went home, studied and prayed, then I received, and I spoke in tongues that same night in my room, since then was taught that was the way it happens.
Scripturally tongues seems to accompany every indwelling shown in Acts so the pattern is there, but I also can't see anywhere that it is clearly stated that it has to be that way.
On the other hand, God does have a purpose for tongues, and it's more than just messages and interpretations (in my experience/opinion those are meant to be more rare to emphasis or instruct on a point not an everyday occurance. This is times when God speaks directly, and although I have been used in both speaking and interpretting, it scares me in alot of ways, because that is not a time to be in the flesh or pretending, you better be saying exactly what God wants and getting yourself out of the way.)
Paul says in I Corinthians 14:4 that "He that speaketh in an unknown tongue edifieth himself" and sometimes we do need that uplifting and edification. Not in a public or showy way, but personally, and whether that comes at home in personal prayer time, or at an altar, it is personal between you and God. Many look at it as emotional fluff that is not needed, but God did create us as emotional creatures too, and our relationship with Him should be emotional as well, as long as it's more than just that.
I know we have seen excesses in the pentecostal church, but I have been in other churches as well and seen the same thing, it's not about how you express the emotion, but the lack of any depth behind it. Joey preached to the kids last night about turning our Christianity on and off, being a christian when it fits, but keeping the rest of our lives separate. We all know that isn't spiritually healthy, it's no different than a husband or wife turning off their "Married Life" in that case it's called adultry. If we think we can turn it on and off and get by, we may have the emotions, but there is no depth of committment or relationship there, so even the emotion is false, and that happens with or without tongues.