to be fare, 90% of the qataries are kind and friendly ... it is true about what have been said 'if you are asian that qatari wont be friendly but that falls among the young qataris' .. but over all they are kind and friendly even if they dont know any english they will do what ever to help you if you need help ... Iam qatari and i agree with every thing that have been said .. from all the users ..
the point is ... just give the qatari a friendly smile and he will be kind and friendly with you ... dont give them the dirty look because they will be rude and awful ...