This seems to have been asked and answered - we get so caught up in labels and how our actions may or may not pigeon-hole us or cast us in a certain shade.
Remember, one of the most important things to keep in mind is that we are on a continuous linear path from beginning to end - if you decide to take any action, or no action, you continue to move forward on your personal timeline because it is finite. This is life - a linear, continuous path, whether you decide to live it, live it poorly, or live it well.
That being said, since we are all communicating on this forum, it seems we have all taken it upon ourselves to live our lives well, true to our definition of what that means - we are constantly evolving and thus should always be adaptable as Change is truly the only constant. There is a point here, stay with me.
In order to truly take advantage of the opportunity given to each one of us, it is incumbent upon us as individuals to live our lives true to ourselves, unique to ourselves, and as full as we can - be true, be unique, and live life fully - now in order to fulfill life's ultimate purpose (according to my personal philosophy at least), it is important to share our experiences, the burdens that we have been forced to bear, obstacles that we have overcome with those we come in contact with - the exchange of ideas and information makes us all better for it, and adds another element to our lives.
So, every day, improve yourself, add knowledge and merit and value to your life, become better, more interesting, be confident and share. Being Alpha is being a Virtuous Modern Man - strong of spirit, strong of mind, strong in principle - one who knows what he wants and continuously iterates his approach and actions to get to his goals.
Everything else should flow from the core set of values that form your foundation. Confidence, Sexiness, Success, all the other cascading attributes will flow from there - the selflessness or selfishness (whatever/however you decide to view this next point
) of joining with a partner and pleasing her to the umpteenth degree is derived from there - it is not alpha nor beta behavior if you have rough sex with her or go down on her and stack her orgasms - it is consensual joining and mutual pleasure or at least it should be - it is Alpha to please her completely physically (to orgasm) and have her glowing and happy because as an Alpha male that means you will get yours as well and you have been a virtuous giver of pleasure.
I hope this makes sense and you can thank me later for this too long thesis