I also really like the Korean words containing the syllable 과 (gwa) for no reason other than I like the way it looks in writing. And something about the word 바쁘다 (pappeuda) "to be busy" makes it sound really... cute?
I don't know very much German, but fünfundfünfzig makes me smile eeeeevery time.
Do you all have favorite words in the languages you're studying? Why do you like them?