it is not allowed to vote for the own site!!!
If you do a vote for websites asking for their favourite, you should consider the different types of websites.
So it is hard for a user to judge this.
You mentioned these different types:
forum only, international
forum and used gear, news (only german)
(German & int'l)
int'l for windforecasts
news, forum, infos french and english
closed due to stupid postings, was the former leading forum in spanish
news, info, forum international
news, info, forum only in German.
So you can see that many users will have more sites as there favourites.
The only website which can be compared is flysurf.com and kite-surf.com.
and kitesurfing-kiel.de with oase.com
My favourites are following:
kiteforum.com for int'l forum
kitesurfing-kiel.de for german forum
oase.com for selling my used stuff in Germany
windfinder.com for forecasts and actual wind
flysurf.com for the chat when they had someone from a company, but since kitechat.com not anymore.
So, that is my vote.