Ramadan Mubarak!
I know this topic is favourite verses, but my favourite surah is so short that im sure the whole thing will qualify:
(An-Nas)
Qul a'uzubi rab-bin nas
Malikin nas
Ila hin-nas
Min shar-ril waswa sil khan-nas
Allazi yuwaswisu fee sudu rin-nas
Minal jin-nati wan-nas...