VORACIOUS

having an insatiable appetite for an activity or pursuit

ravenous

/excessively greedy and grasping
SYN - rapacious, ravening
"paying taxes to voracious governments"

devouring or craving food in great quantities
SYN - edacious, esurient, wolfish
ANT - unacquisitive
"voracious smile"

"He had been so voraciously pursued by her at the beginning he got used to and even started to depend on this sort of affection."

"He had voraciously went about reading his philosophy, until he had read every word he had ever written."

"He hated having to give more money to these voracious companies when he could be giving it to his local video store."