just imagine what if you had 2 teams that you really like? would you like both of them to become UCL title holders? 
but I'm sure you will prefer Man City to be the UCL title holders this season.
IMHO, each person must be a fan of 1 football team. I don't know if someone can be a fan of 2 teams or more. but I'm sure you will prefer Man City to be the UCL title holders this season.
Sure, there will be 1 winner only, you must choose 1 team to be the favorite team. I prefer Man City to win it because their squad looks better, specifically when all the players are in good condition. Now, the injury players have recovered, they are ready to show their best performance in UCL.
honestly, I admit that since KDB return, Man City looks very beautiful at the moment and when Haaland returns to appear with Man City, his performance will definitely be strong again, but we'll see if we can see Man City and Real Madrid competing in the final.
Indeed. The return of KDB and Haaland will be the key of Man City to win the UCL. Although Real Madrid also has a strong squad, it will be difficult to beat Man City with full squad. However, it will be very interesting if we can Man City vs Real Madrid in the final round. But it only can happen it one of them can beat Bayern Munich in the semi-final. Liking doesn't mean being a fan, maybe he just likes the way Manchester City plays and likes the depth of the squad and is not a fan.
You're right. When you like a football team, it doesn't mean you are a fan of the team. I like Man City, but I'm a fan of Real Madrid.