Any good manga to read?

If your not reading old manga then you just miss something gold!
Most old manga are gold/gems compared to new manga right now. (Well some of them)

Assuming ur into action and fantasy, you can try this:

Kenja no Mago : https://myanimelist.net/manga/90561/Kenja_no_Mago
Tensei shitara Slime Datta Ken: https://myanimelist.net/manga/87609/Tens..._Datta_Ken

both have the concept of "reincarnated in a new world" and both MC are OP.