For me, watching it live is mandatory because it allows us to make decisions based on the action we see at that moment.
But still, in the end - betting live feels fun only when we win hehe.
Most of the time I only watch it on TV at home, so I dont need to wear my favorite club jersey.
And if Im watching my favorite team broadcast live in a public place, such as a cafe, bar, square, etc - wearing favorite team jersey is a must.