My idea of the best strategic holes are those which are the most tempting combined with a hazard(s) which has the potential to create a double bogey type score if one doesn't execute. The hazard doesn't have to be death or anything close to death, indeed, for decent players par may still be had...or else the players will not be sufficiently tempted by the risk. You don't want a lot of running away from hazards at all costs. Its a fine balance, but like anything in golf, variety is important.
Ciao