Sun + Genesect? Couldn't resist making a kickass team. I would say that Sand was definitely the best weather in the Excadrill era, but followed by Rain, not Sun. The latter really did not have much at all to work with - until Venusaur got Giga Drain with Chlorophyll, it was relatively useless. After Excadrill left the metagame, though, Rain has consistently dominated OU, with Sand a couple steps behind the whole time. Sand even fell behind Sun in my opinion for the short time Genesect was OU legal. I agree we need to stop looking out for weathers and start looking out for individual Pokemon, but we can't be too extreme with the suspect process or we'll end up doing something that we'll regret later (hi Manaphy).