The major factors that a game is attracting me are the challenge and new elements.
When I joined this forum 3 years ago, boths factors existed.
1. challenge
In term of difficulty in my opinion (natural map and default setting).
- 10 -- Warmonger sandwich, i.e. you are the only LT of 2 warmongers
- 9.5 -- semi-isolated starts with a warmonger and you are neither Mali nor any protective leader.
- 9.0
same with above, but you are either Mali or any protective leader.
Pangaea map with all warmongers, average starts without any strong commercial resource.
- 8.5 -- isolated starts with poor continent.
- 8.0
Pangaea map with all warmongers, but have a capital with strong commerce resource.
You are the only LT of a warmonger.
Isolated starts with average continent
Bonus difficulty AW +10, team AIs + 3
At that time, I still struggled to win above deity games due to the lack of personal skill. I consider capable of constantly winning the games of 8.0 and below to be a true master of a certain level.
I was quite active in S&T forum and looking for challenging games, my immortal AW and deity team SGs represented the end of this stage since I know the cap of my personal skill -- difficulty of 10 mean 100% failure for me.
2. New elements
In the 1st stage, my purpose is winning the game and therefore most of the games ended with military victory or military based diplomatic victory. The fact is that there are other types of victories which require different sets of skill, I realized this after I joined the GOTM forum and learned a lot of things from some excellent GOTMs. 15 minutes of reading of those GOTM winner games could give you a lot of information that you have not realized before. My purpose turned from winning to optimizing. However, challenging still exists now, I'm challenging the human players and human teams instead of AIs.
If you are looking for improving your personal skill to beat deity games, there's no need to play easy maps with locked assets.
- Replaying certain representative games multiple times until you feel no mistake yourselves to train your micro skill
- Playing games with harder settings to see where is your final cap.

BTW, I have not watched any video since I don't have the time and patience for the long ones, and short one are usually poorly played, which are only good for beginners.