It appears that this amendment would allow states that wish to do so to declare that two men or two women can be married to each other (i.e., that such a thing is possible).
Do you believe the Federal Constitution should be amended so as to recognize the right of states to do this?
Well, yes.
But only if it allows a State to define Marriage in the traditional sense as well.
I don't believe there is a Constitutional basis (but, certainly there is a moral, cultural and historical basis) for the Federal Government to define Marriage.
Not without an Amendment that says they can.
If the vast majority of the nation wants that, they can make it happen.
According to Article V the Congress and the President don't even have to be involved.