Change a rating?

I mostly decrease too as I try more/better rums I realised I over-rated some rums.

Decrease, it's normal i guess, like Rob said

I generally increase, maybe the flavor changes after it gets a little air or after the initial shock of a new flavour it goes down smoother. Like the first time is an awkward first date, and the second time around expectations change. It's usually only a 6 to a 7 maybe a 7 to an 8. 9s for me need consistency and 10s are hard to come by. If I buy a second bottle it's usually a 9 or 10.