I like to grind sometimes, if it allows me to use skills a lot. Flyff and guild wars were pleasant grinds, mainly cause I was always looking for that next drop and what it might be. Rappelz grind was boring. My skills were to few and far between with the cool down and the mana depleting at alarming rates. It was just boring and SLOW! Fast grinding is fun. If the combat is fast paced and keeps me on my toes, then yes I love grinding
After a day at work, getting home and doing something mindless but advancing you is relaxing. Well, until you loose the 5% exp that you just spent and hour getting
