1- Working at night - I just can't work at night. My attention, creativity, focus, everything just go aways at night. I need to have my mind completely blank at night, do whatever that won't make my brain work. I've tried doing this (working) many times, but i just don't work right at night.
2- clients that...
2.1- ...are always late. Self-explanatory. The ones that piss me off the most are those that come late and say 'hey man, sorry, i arrived home drunk at 6am and just couldn't make it at 8am, I had to sleep some more'.
2.2- ... have crappy instruments and insist on using 'em. Self-explanatory.
2.3- ... can't just finish their parts. There's always something else. 'Hey man, what if...'
2.4- ...ask for stupid things like 'Can you put some FX?'. Some FX? WTF! I have a bazillion of fx to scroll and it is NEVER the right one.
2.5- ...always give stupid excuses for not paying on the right date. 'Hey dood, mah dawg just died and I had to pay for the funeral services'
2.6- ...just because they have some pirated daw that they download one week ago, they try to teach me how to work.
3- mastering. Can't do it, hate it, wish I had someone to do it for me.
I know, only three, but I have one more:
4- It killed my guitar playing days. I just can't listen to music (that i dislike, most of the time) for 8 hours daily, come home and have any energy to play guitar. I am playing more guitar these days because the studio I work on is jobless atm, but I know that when I come back to work i will feel like burning my guitars :s
There's actually a lot of stuff I dislike (i bet you guys two have too), but I love working with music, and honestly, I can't do a lot else.