There's all sorts of opinions on what the inside of one is like... I've seen a lot of people claiming it's like suspended animation and they don't register the passage of time, but, the anime establishes that they're aware of what's going on outside of their pokeballs while they're in there, which in my opinion makes it worse.
Suspension is pretty bad too. Imagine: you're brought out to fight for your life. You get knocked unconscious. Will you ever wake up again from those terrible wounds? Next thing you know you're up again, fighting for your life against some other monster. If you win, you go right back inside with the taste of blood in your mouth with the next thing you know is another life or death battle.
This happens hundreds of times until your trainer brings you out once to show off and being conditioned only for violence, you attack the first Pokemon you see. Horrifying onlookers.
I honestly love Gnome. But then again it also is very distraction free which is good for my ADHD. It helps keep me focused on both my desktop and Thinkpad T480 when I use either one.(─‿‿─)
KDE is good too, but when I used it, I spent more time tinkering than getting anything accomplished. (¬_¬)