I often would like to get the opinions of other developers, as the SO structure is great even for subjective Q&A. However, I think this may be prohibited? Is there a correct way to ask such a question?
No but seriously, there's no place in the Stack Exchange network to ask open-ended, subjective questions. Those questions are fundamentally off topic everywhere, though some communities may bend that rule slightly more than others.
I've never really been there, but you could try asking your question on Quora