It's all about preference. My advice to noobs is to start at 65%, because it's a good, moderate, middle-ground rH that 90% of BOTLs keep their stash at. Most of us find that at higher rh like 70* cigars are too wet, with burn problems, and muted flavor at best, bitter, harsh, or acrid flavors at worst. Too low, say sub-60%, and you get brittle, cracked wrappers, and a general lack of flavor because the oils have evaporated. But some guys, myself included like a lot of cigars at 62%, finding the right balance there, while others prefer 67% because of the type of cigars they smoke and their smoking methos.
The only way to know for sure though is to get 3 small food-safe, air-tight containers (tupperware), and get one of each of the Boveda 62, 65, and 67% bags. Pick five cigars of varying types, and get three of each chosen cigar. Put one of each cigar in each container with the Boveda. Wait 4-6 weeks for them to accumulate, and sample; then you'll have an idea of the difference and can decide for yourself where you prefer them to be.
