I had some good no-life moments training my accounts to pk. I made goals like 99 strength in 30 days, 99 range in 30 days without chinchompas, and 99 range in a week or less with chins. It was a lot of fun and it was a good competition with other berserker pures and friends. I also no-lifed things like quests. Staying awake for 1-2 days wasn’t uncommon and I sometimes fell alseep while afk training.
I generally don’t regret spending so much time on accounts. But then there were things like bounty hunter and FPS lag that made me regret ever training up an account.
I’ll probably train an account in OSRS pretty soon, mimicking an earlier account I completed in 30 days. It was primarily an antirusher, but I liked the build for pking. I might even no-life it, although I’ll probably get out and get some exercise. I won’t be playing for days anymore.