I hate training in general. Just drags balls really.. I've never maxed a skill. Since they brought 07' back I might try max, or get close to max one.. Ultimately my least favourite is theiving and mining.
Agility.. idm farming I just do farm runs (herbs/flowers/the other thing at the patch with herbs and flowers) whenever I'm on, makes profit, and only takes a few mins at max..
Thieving or Hunter, they both annoy the shit out of me for repetitiveness without a break. Firemaking IK is like that bit I usually mix that up with some woodcutting.