Perhaps this should be in the General Writing forum. I'm not sure, but... How do you feel about a character being described/defined over time? It never bothers me when I read, but I suspect it might bother people. For example, a character is introduced as "tall and thin" and then a chapter later something may be added like, "his blue eyes." You may have already pictured him to have brown eyes, but are informed otherwise. Is this frustrating to you or do you not mind it?