rewarding	gives you a lot of positive experience (dający satysfakcję)
fruitful	produces good results (owocny)
lucrative	makes a lot of money (lukratywny)
therapeutic	makes you healthy in body and/or mind (terapeutyczny, leczniczy)
relaxing/calming	reduces stress, gives a peaceful feeling (odprężający, uspokający)
time-consuming	takes a long time to do (czasochłonny)
culture vulture	big fan of anything cultural
couch potato	physically very inactive person
dabbler	person who never keeps doing one activity for long
doer	person who believes in acting and doing things, not just thinking
shopaholic	person addicted to shopping
to be into sth	to take a great interest in/be very involved in
to go off	to stop liking/lose interest in
to lock yourself away	to isolate yourself from the world
to hook on sth	to be addicted to sth
to get up to sth	to do sth
to have a full diary	to have a lot of commitments/activities