Acually, is this a question about order of writing (as in 'i thought up the chorus first') or about the structure of the song itself (as in 'it goes verse, chorus, verse, chorus, bridge, chorus)?
I think people are expressing conflicting views while answering a completely different question

Does "lyric block" fit into verse or chorus? Because most of my songs don't have verses or choruses, they just have several sections of lyrics.

My songs generally tell a story or show an emotional progression, so the verse is almost always the place I start. My choruses are like my thesis statement, I usually write them last if at all so that they can encompass the idea of a song as a whole. I usually struggle with chord structure transitions from the verse to the chorus and bridges are particularly difficult, but the words aren't usually a problem. I agree, the most natural approach is probably going to produce the most listenable results... although I do like to write down random snatches of lyric that sound good while i improvise and then piece them together on paper so that I don't forget them. After all, how can I share my genius (ha) with people if I can't remember it?

verse, or a bridge

when in doubt consult the epigrammatic Nirvana song Verse Chorus Verse

i write the Verse, Chorus, 2nd Verse, (repeat first Verse), bridge, (Chorus) in that order

I write chorus first to give myself a general idea of what I want the song to be about then I go through and write the verses.

Depending on the song I may use the first two lines of the chorus as an intro then go into verse 1 then the full chorus verse 2 small bridge then outro chorus.

Still say choruses are for weaklings.

usually a verse is used to tell a story or something but the best or climactic beat is done in the chorus.

no matter which comes first (which is usually the verse), it should be meaningful

um, hello? this is asking people who write music

So when does your LP come out then?