Cuz he wants to defend/protect his precious/friends/family.
Ichigo fights White Ichigo in Episode 270 of the Bleach anime titled "Beginning of Despair... Ichigo, the Unreachable Blade." This fight between Ichigo and his inner Hollow serves as a pivotal moment in the series, revealing deeper layers of Ichigo's strength and inner struggles.
I'm not sure who is hotter but in a fight my money is on Ichigo
its ichigo's theme - number one.
269 ichigo and ulquiorra release there swords
235 I believe
when inoue, chad, ishida and ichigo go to the soul society to save rukia from being executed
episode 167
Goku. He destroys planets.
Ichigo and Ulquiorra fight in quite a few episodes, but most of them are just minor fights. The real battle between them comes in episodes 270 and 271.
In episode 267,268,269,270,271. btw its ulquiorra
next tuesday.
the ones i can remember of the top of my head is episode 266 onwards at the minute when ichigo fights ulquiorra