1- Years ago I was very interested in finishing maps into the traditional arenas, even I bought maps repeatedly just to have a toptime, I never passed a map in training because I wanted to finish it in any arena. I managed to pass difficult maps because I was motivated by how good my nickname looked in the list of toptimes, imagine seeing a single tt from Gteatero in Doomsday Ending, just epic. I liked that people saw me as a pro so I tried to tt on the most difficult maps from that era(2016), it motivated me a lot. Nowadays this is different for me, I don't care so much about having Toptime in some traditional arena due to the fact that the motivation is not the same and there are no maps that represent a real challenge apart from Progressive Torture, nowadays it is normal to see Someone finishing Overdose so I'm not motivated to finish it, New Age is considered as an "not really hard" map, even if someone see my name in New Age toptimes it won't be impressive. The worst thing is that nowadays doesn't matter the difficulty of the map, because it will have at least 3 tts in a week. I would go to the traditional arenas to try maps that are considered ultra buggy or awesome to see a tt, like Naval v2. Due to this situation, I prefer to do toptimes in training arena and thats why I rarely go to HDM arena, also I can try to finish maps anytime without spending $
2- I like training because I can play the map that I want any time, in training arena I sometimes play maps that are unplayable in traditional arenas, such as Challenges, which need at least 10 redos to have a Toptime. I like to play alone or with friends, when a stranger spectate me, I use the option to disable spectators.