My initial reaction is 'hell if I know'. I just write however it comes to me, too; I've only recently started figuring out all this formal meter business. Before the last year or two, I used to just read over poems in my head and figure out which lines had the same rhythm as each other within the poem.
But because I geek out over all varieties of analysis, I've given it some thought.
The reason meter is so important to me is because rhythm is pretty central to how I process speech in general. The same thing applies to music: I am tone-deaf as fuck, but if I know a song well, I can tell when the live version hits a note a few milliseconds too late and it's like nails on a chalkboard.
So when writing, I used to structure the rhythm of a poem by matching one line to another—three lines the same in every verse, say, and the fourth shorter to close it off. If you can just keep the syllable patterns lined up in your head, you can do it that way, and never have to care about all the fancy terminology.
In my opinion, you can call yourself a poet if you write things that you call poetry.
Worrying about the academic analysis is not a requirement.