IMHO, only teh last one looks better after sharpening. In teh first three, all it did was increase the amount of noise.
One tiny piece of advice in regards to other people's opinions: I personally don't think that 'all that matters is what THEY want', even if they're paying customers. YOU have to be the one standing behind your art/product; at the end of the day it's YOU who has to go to bed satisfied with your day's work and YOU need to feel good about what you're creating.
If you're always trying to make everyone happy, you'll never get anywhere; don't let some random person's vague criticism nurture any kind of insecurity within you.
Honest, open, and detailed TECHNICAL advice is what you need to look for and be open to - ignore soundbites like 'too soft/too hard', 'too saturated/too pale', etc. Those are matters of personal preference but have nothing to do with the actual quality of your art/product.
I love number 2 in the original post, btw.