If you hear negative comments don't take it personally. This is not a personal situation, you may think that your home is the greatest, but it may not be right for the buyer. Typically weekends are the best times, because that is when people are available. Consider scheduling open blocks of three to five hours at a time. Being flexible is essential.
Some people only have time during the week.
E-mail and communicate with buyers who contact you to find a time that works for both of you. Everybody has different tastes. You may want to take down artwork or items that some may find offensive. Create a relaxed mood. Playing jazz or classical music in the background is nice.