Language and its nuances can reveal many things about the language users and their characteristics.
The Germans are optimists or at least neutral, they say “halb voll” most of the time, and “halb leer” from time to time. Well, even its not true, they have the choice :)
For Latvians, there is a word for “halb leer”=”pustukšs”
but no word for “halb voll”, which literally would be “puspilns” – which could only be used if a person is almost drunk, but not quite yet.