Spell hunting is wonderful. :P I'm not sure why I enjoy it so much.
The only time I didn't like it was when it got ridiculous.
For instance, spending more than an hour on one spell when you have capped skill, at that point it was just tedious.
Or pretty much all the spells from 60-70 that were out in Aht Urghan areas. They were awesome spells but you cant learn those solo at that level. The mobs are all tough and above, just killing those things was either a chore if not impossible.
Since blu was my first job I couldn't just burn it up higher and get them later. I had to pretty much bum off higher levels for help, and thats when reason #1 really started to hurt. Hard to get people to help you kill mobs for hours just so you can learn a spell.
But Blu has and probably will always be my favorite job. So versatile, and has a great feel to it, if that makes sense.