Perspective

So I am well into the second draft of my book, and still toying with the idea of changing my narrative perspective.  The book is currently in third person omniscient, meaning it gives you access to every characters relevant actions, dialogue, and thoughts.  But I have experimented with other methods, such as a shifting first person narrative, meaning it would be told from the viewpoint of different characters.  Can't decide if it's better that way because it's more personal, or if it's too distracting.  I've read several books in that style, and while some pulled it off really well, others seemed unfocused.  Please read and give me your thoughts :)

Here is a excerpt from an early version of manuscript, told from the p.o.v. of Alex:

"I returned to St. Augustine with the dark skies and cool winds of hurricane season, crossing Usina Bridge at dusk, the lights of the city sparkling below me.  Why I ever returned to the one place I swore I'd never go again is still a mystery to me.  All I knew was that for some time I had felt the city beckoning me home, calling to me with her siren song.  She followed me through the day like an unwelcome shadow, and when I lay down at night she laid down next to me, whispering into my ear.  Finally I had no choice but to return to the life I'd run away from, the family I'd left behind, to this city... my Ninevah."

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