My favorite use of alliteration is in this Holy Sonnet by John Donne (the only A+ I ever received in college was a short paper on this sonnet).
Batter my heart, three person'd God; for, you
As yet but knocke, breathe, shine, and seeke to mend,
That I may rise, and stand, o'erthrow mee, and bend
Your force, to breake, blowe, burn and make me new.
I, like an usurpt towne, to another due,
Labour to admit you, but Oh, to no end,
Reason your viceroy in mee, mee should defend,
But is captiv'd , and proves weake or untrue.
Yet dearely I love you, and would be loved faine,
But am betroth'd unto your enemie:
Divorce mee, untie, or breake that knot againe,
Take mee to you, imprison mee, for I
Except you enthrall mee, never shall be free,
Nor ever chast, except you ravish mee.
Another reason I like it is that it exemplifies my struggles with faith. Faith is not easy for me; I have to work at it. Although, I do have to say that the rape imagery is problematic for me as a Feminist.