I do not care much about getting M/H. Most people don't even award a M/H to their questions. According to what I've noticed, people appreciate it more when you are being funny or sarcastic than when you take the time to write a well structured opinion. I have no idea why, but I've seen it happen so many times. However, I am not going to lie, I have posted junk or non-helpful opinions. The effort I put on my answer depends on 3 factors: My mood, the seriousness of the question and whether I like the question or not.
I am not here for the xper points. I wanna help others with their problems and just express my opinions where they are needed. I find reading other user's questions and opinions educational and interesting. Along with that I enjoy getting opinions from others on my questions. Not everything can easily be found on Google. Some things are easier to get by asking regular people like me on sites like GAG.