I'm designing a complex robot and I've got some ideas that I want to get opinions on before beginning development. Is that OK, or should I make the question more answerable?
Questions asking for opinions tend to get closed as not constructive on most Stack Exchange sites.
The not constructive close reason says:
Much better would be to ask practical, answerable questions based on actual problems that you face.
Ultimately though, many answers on stack exchange are more opinion than fact, and design choices are often informed more by convention and belief than by experience and experimentation, so we have to accommodate answers less rooted in fact. We do however prefer poeple to back it up. See the Stack Exchange Blog post Good Subjective, Bad Subjective.
How your question is phrased could very much impact on the perception of your question. For instance
implies that you want opinions. Whereas
would be much more likely to be answered and voted up. Especially if you explain what options you have considered and what your concerns are about those options.