I would say that in a nutshell, spirituality is consciousness. While I would agree that love is important, showing love to others becomes a problem if you're only conscious of yourself. When you consider the golden rule, the other person may not want you to do to them what you would have others do unto you, that is unless you acknowledge them from the level of a fellow human being. At the very least, it means seeing more than your own perspective.
I think feelings and peak/peek experiences can be associated with and can even in fact be a part of spirituality, but it all depends on how you interpret it. Sometimes people just want to experience that blissed out state all the time, but even if that's all you wanted you won't get it by just being attached to the feeling. Feelings of pleasure and pain are often just signals that tell us what's going on, not what's actually happening. When I have such an experience, I test it. I may play with it to see what will happen if I do this or that, or if nothing else I will analyze it afterwards to see what led up to it to try and better understand it.
I think another part of spirituality is self mastery. You can read and gain book knowledge about all kinds of practices, but you have to do the practice to actually see any benefits. At the same time, the practice isn't an isolated task that has nothing to do with other things in your life. It ties in with consciousness, because a certain level of subjective awareness is necessary. A person can have a strong intellect, but if he doesn't even know when he's under the influence of a drug such as alcohol, or maybe lacking in objectivity because of an emotional reaction to something someone else said, then his thinking would still be suspect.
So, while I'm not the first person to say it, I do think spirituality is also a matter of development and maturation. Children tends to be self centered in that they can't see beyond their own perspective, and we know they have to first master the senses and then move on to intellectual development, so I think spirituality is a higher level. While some people point to the body-mind's circular relationship in terms of it's bi-directional flow of information exchange, I think developmentally speaking you do kind of move in stages. You still have your body, but just as the body supports the brain, which supports the mind, you might say the mind in turn supports the spirit. It's possible to be spiritual with poor health, but I think most people would agree that it is preferable to be in good health, (atleast have the body in a state of homeostasis) and of course being closer to the spiritual level, neurological or mental illness would make it all the more difficult to develop at that level.
Because it isn't just a matter of intellect, there isn't much use debating the issue with someone who has a different perspective. To me someone who is going through the stages will eventually build up to the "higher levels" because that's just a natural process. Whether they choose to describe the experience with the same language is questionable, but I think once someone is "there" they'll be able to recognize that what others have described in the past matches their own experience.