Vitamin D: Severe depletion can give you unspecific symptoms so it's not bad. There's just no need to test it more than once really. If you are depleted just take supplements.
Flu: Still beats me why this would be useful other than general interest (which sometimes is enough I guess).
Testosterone: still not sure why you would like to test this regularly at home. But I'm not an endocrinologist.
CRP: Very unspecfic marker of inflamation.
LH: I guess I was wrong and this could be quite useful http://www.ncbi.nlm.nih.gov/pubmed/950047
Vitamin D: Severe depletion can give you unspecific symptoms so it's not bad. There's just no need to test it more than once really. If you are depleted just take supplements.
Flu: Still beats me why this would be useful other than general interest (which sometimes is enough I guess).