Like you, I prefer this strategy because I enjoy following the matches I bet on. Perhaps this is the healthiest thing about gambling, meaning that gambling games remain linked only to sports matches. All other forms lead to disastrous results in cases of addiction. Gambling companies are not subject to any restrictions in game designs. Personally, I consider slot games and all online games to be a real waste of time, and I am surprised by this great demand for them.
It has pros and cons.
When you bet on a match you are watching/ following, you are likely enjoying the match and every situation in the match. In entertainment aspect, it is good for you to have fun and refresh your mind.
But it is not only good, if you are a type of person who can be affected by emotion, you will make more extra bet during the match. By emotionally bet more, you are taking more risk with more emotional bets. It will potentially lead you to more inaccurate bet decisions.