I just think Serie A is super competitive, if you start at the top. Both Milans, Napoli, Lazio, Roma, Juve all able to compete...some other nice teams like Fiore, Atalanta, Sassuolo also able to compete if you do well. If you go lower down the leagues there are some nice legacy teams to bring back to the top of the game.
Lots of world class players spread throughout Serie A (Kvara, Osmhen, Barella, T Hernandez, Leao, Pulisic, Maignan, Tomori, Thiaw, Lui Alberto etc etc).
I also like that the finances aren't insane like the Premier League, so it remains a challenge and it remains competitive. You can sell players for big money to the Prem and other big European clubs and still bring in lots of money.
I prefer it to Spain and Germany by a long way.