Diabeties
If you do not have diabetes in your life, but dream that you are diabetic, then the dream may mean that you have difficulty enjoying the sweeter things in life. You are worrying too much instead of taking time to enjoy the moment.
Fair
To dream that you are at the fair suggests that you may be regressing into your childhood where times were simpler. You feel you can let your inhibitions go and forget about the cultural mores. Also consider the various side shows and arcades as they could symbolise aspects of your personality. Alternatively, the dream may also be a pun on fairness and being fair in a situation or decision.
Quicksand
To dream that you are sinking in quicksand indicates feelings of insecurity. You have misjudged the solid foundation that you are on. Perhaps you have mistakenly gotten too comfortable in some situation. You need to pay attention to what you are doing and where you are going. Alternatively, the dream is analogous to regressing into your subconscious.