In the west I always had waterproof clothing. I do not need to explain the reasons why but if you ride all year round they are essential. Here in the Philippines it is not such a straight forward decision. It can rain a great deal however it is never cold. Humidity is always high and I have found that if I don a set of waterproofs I end up just as wet as I would have been if I had not bothered. The reason of course is that I sweat a great deal, and by sweat I really mean sweat, your clothes can be soaking. Now, given a choice I would rather be wet with fresh rainwater than salty secretions. Also, because it is so warm I find that my wet clothes will dry quickly if I am not wearing waterproofs whereas I will stay wet if I am wearing my proofs. Suffice to say, my waterproofs have remained in the wardrobe for the last several years.
No argument here mate! :-)