Which is better to answer, thought provoking questions that are not 100% grammatically sound, or questions that are 100% grammatically sound but is as thought provoking as a used dry sponge?

disclaimer There was no way to pose the question other than a comparison and still keep the heart of the question intact. For those who abhor such a precise focus, my apologies.

Overall, if you had the choice between grammatically correct questions that were about as stimulating as an old dried up sponge, or questions that really work the Gray matter between your ears but were not 100% perfect in grammar, and I will toss in spelling, which would you rather spend time answering? Sure, IF you manage to find both in the question, there would be no need for you to choose an option here, I get that.