My opinion, I would probably have to say some of the shorter replacement blade heads on the market. Mechanicals are great for accuracy out of any bow but you really have to know your KE levels in order to gauge how effect they are going to be for you. Because of this I would not recomment them for everyone. Cut on contact heads are excellent penetrators but their large surface area makes them much more finicky to tune. Traditional replacement blade heads like Muzzys and T-heads are also very good but can suffer from some of the same issues as the Cut on contact heads.

Just my two cents but in general I do agree that it can boil down to personal preference in many cases.