Getting the technique down is helping me a lot. Getting it to stay mid nose helps the burn, and prevents the sinus drain bit of discomfort.
I have heavier sniffs, but they are all small, which I expect to last me a long time. I want to try some brighter ones - lemoncello, lambic, etc. If the tins are kept in an airtight box together, will they go "bad" (dry, cross contaminate, etc.)?