I am 28 years old, am I a good hair transplant candidate (photo)

You have a Class 7 pattern of balding and this balding pattern has a high need for hair. To find out if the supply of your donor area is adequate, you will have to have it measured. If your donor density is very high and your hair is no fine in thickness you may be a reasonable candidate.  If, on the other hand your donor density is average and your donor hair is coarse, you MAY be a candidate. Lower hair thickness and low donor densities make your balding pattern very difficult to fill with hair unless you become bald in the donor area, something nobody wants.