Some thoughts...

This is not written as a formal paper or argument, so do not judge it as such.

Christianity and its many forms call for proselytizing, as does Islam (and many others I'm sure). Throughout history, both religions have held a viewpoint of "Convert or die!" Sadly, that viewpoint is still in existence today. The holy books of both religions give examples of such ideology and/or call for the death of unbelievers. Thankfully it is only the more extreme, hardcore believers that would still put that ideology into practice today, but such an awful concept is displayed and put into the minds of all who read/hear. My knowledge of Islam is limited, so I shall now speak about what I know - Christianity.

The Old Testament is full of stories in which people, such as the Canaanites, are slaughtered (usually without being given the chance to convert) simply because they aren't Jews, they don't believe in the right god, and they own the land the Jews want. As a child, I found the OT both fascinating and disgusting. The bizarre stories it contained were largely skipped over by my teachers and pastors (probably because of the confusing and even horrendous nature of said stories) at both church and school (I attended a Christian school), but I still read through my Bible and found them. When I attended a Christian college, and we worked through the whole Bible in two survey classes, the bizarre stories came to light again, and were passed over by the teacher either entirely or after he'd only said a few words. We discussed the children of Israel and their long battle to claim Canaan, but no-one ever said a word about how awful it was that they were being ordered to massacre people. During the time of the OT, if you weren't a Jew, tough luck - you're either going to be serving the Jews, distant enemies, or massacred for your land (unless you were lucky enough to be a virgin, and God said they could take you alive, which didn't always happen).  Once you hit the New Testament, this ideology largely disappears, because now Jesus is telling the Jews to love their neighbors, enemies, and everyone else. The Jews of the OT were an exclusive bunch and did very little proselytizing. In the NT, Jesus seeks for converts, but focuses on the Jews. It isn't until after Christ's death that the conversion of gentiles is sought after. From that point on, history is full of Christian attempts to proselytize the rest of the world, be it with love or force. Heretics are burned at the stake (even by such illustrious leaders as John Calvin), those suspected of witchcraft are tortured and killed, and on the list of things done in the names of Christianity and God goes.

Spiritual but not Religious

"Spiritual but not religious" is a term I stumbled across a few months ago (when I was searching for an appropriate term to describe my religious views). It's a rather vague term, and it probably leaves most people scratching their heads and wondering "Well... what on earth does that mean?" When I first saw the term, and then read it's definition, I knew it was the correct description of my beliefs. Before I write any more, please read this definition found in Wikipedia's online encyclopedia:

"Spiritual But Not Religious (SBNR) is a popular phrase and acronym[1] used to self-identify a life stance of spirituality that rejects traditional organized religion as the sole or most valuable means of furthering spiritual growth.[2] The term is used world-wide, but seems most prominent in the United States where one study reports that as many as 33% of people identify as spiritual but not religious.[3] Other surveys report lower percentages ranging from 24%[4]-10%[5]
Those that identify as SBNR vary in their individual spiritual philosophies and practices and theological references. While most SBNR people reference some higher power or transcendentnature of reality, it is common for SBNR people to differ in their ideas of the existence of God as defined by the Abrahamic religions.
SBNR is commonly used[6][7] to describe the demographic also known as unchurched, none of the above, spiritual atheists, more spiritual than religious, spiritually eclectic, unaffiliated,freethinkers, or spiritual seekers. Younger people are more likely to identify as SBNR than older people. In April 2010, the front page of USA Today claimed that 72% percent ofGeneration Y agree they are "more spiritual than religious".[6]
The term has been called cliché by popular religious writers such as Robert Wright,[8] but is gaining in popularity. It has even spawned a Facebook page[9] where members discuss the attributes of the SBNR lifestyle.