FWIW, there is really no one sized fits all answer. If fresh rolled, most premiums do taste really good as they come from the thigh of the virgin that rolled it. Fresh rolled are usually good for a short period then they get "sick" for a period of a few months to a year.
Coobans usually do better after napping for 3-5 years, but then again some smoke good right out of the box. In general the stronger the blend the more it benefits for a longer rest periods.
HTH