How to make one character MC?

As I have mentioned in few posts before, I am totally revamping my Fantasy WIP 2. But here is the dilemma (some good questions were raised after reading Lady Glamis' post on MCs over at the Literary Lab) - I don't know whether to have one main character or three. I did decide to make the hero my central character instead of the heroine. But the hero will be working with two other people (one of them heroine). All three of them have equal status, and there is a valid reason for three of them being together. But I feel as if having 3 MC is too much. Should I just have the one MC and make the other two simply two major view-point characters? I think one of the problems is that in the first version the heroine was the main character, and I am finding it really difficult to move her down. Her role is important, but the only way to make the hero a main character is to make her less important. (I don't mean important in terms of who she is, but rather what actions she will perform in the story.) Unless I make it multiple MC story. Any suggestions? I can't really think of many good stories (except for literary novels) where there is more than 1 MC. There are great major characters, but in fantasy especially, usually just one main character. All opinions appreciated.

Viewpoints

Most writing books and articles have something to say about point-of-view character(s). I have read plenty of "rules" and I have seen a great deal of rule breaking in the books I have read too. It is worth noting that in most "classics" from 19th century and before, character hopping was quite common, as was describing one scene from several characters points-of-view. Virginia Woolf's "Mrs. Dalloway" for example is horrendous for that. It doesn't bother me in all stories, but now because I suppose I have read so much about it, I do pick it up and I do prefer a neater structure. One POV per scene - I personally agree with that. Changing from character to character breaks reader's connection with that character. One might be reading a scene, empathising with Joe, and then voila suddenly its Jane's thoughts we are reading about. Not very effective. Yet some of the well-known writers do this. Nora Roberts / J. D. Robb for example does that in her books. In her "death" series as J. D. Robb, she moves from Eve to Roarke and also other characters. That doesn't bother me as much as Virginia Woolf did, because I suppose it's a series so I know these characters quite well. How do you decide what POV you want to use? How do I decide for my books? For most of my stories, it just comes naturally. For a few of them, I have used First Person and for most of them I use Third Person / Multiple Third Person. For the current fantasy novel, I am planning to use Third Person Omniscient - but I haven't used that before so I am not sure how that will work out. Sometimes I had to experiment. I might start out with a Third Person POV and change it to First, or the other way around. When I first started writing, I only liked Third Person, and had a clear disinterest in First or Second. But one of my women's fiction (the one that is 40% complete) started very naturally in the First Person, and I KNOW that is the right way to tell that story. The only one I really dislike is the Second Person. I don't even like to read short stories in it. There is something very irritating about someone telling you "you walked in the room" and all I want to say is "No, I bloody didn't." Never did like anyone telling me what to do anyway. :P What are your experiences using different types of POV? Do you prefer any particular ones? Why?