I've struggled with the idea of denominations, church plants in areas with lots of churches, church splits, and all the other things that cause the number of congregations to sometimes seem to mirror the number of congregants ;)  I'd contend there are lots of bad reasons that have contributed to the 30,000+ denominations we have today. But I really don't think it's all bad. The deeper I go in faith the bigger God becomes, but people stay small. And while God is infinite, we are very, very finite. Because of that we are also all very different from each other, and that's okay... In fact it's good. It's by design. So it actually seems quite right to me that, as different as we are, diversity in style, in emphasis, even in understanding is necessary as we seek to know an infinite God in our finite capacities. Some people need the structure of liturgy. Some people need the systematic theology of Calvin. Some people need the emotional freedom of Pentecostalism. Where we run into trouble perhaps is in our desire to say we are right to the exclusion of others. Rather, perhaps we are right with the inclusion of others.