I agree when watching a sport sometimes you can just intuitively see things. Sometimes you can get better odds than you would have had prematch. You can see how the players are actually performing on the day as opposed to guessing. I've not tried live betting much yet. Maybe I will experiment with it more. I see that Nitrogen Sports is great for betting prematch, but has limited live betting options. Other sites like Direct Bet, BetCoin, and CloudBet seem to have more options during play. Anybody: what is the best BTC sportsbook for live betting?

On the flip side one nice thing about betting is you don't have to always watch the game. If you are betting many, many games it might not be possible to watch, or you might not have access to a live stream of the event. It might even be not interesting to watch. You don't like the sport, the game's not competitive, you have more important things to do with your time, but hey it's still possible to take a position on a game where you believe the odds are favorable and get paid if you are correct.

While watching a game I would be concerned about errors in short term decision making, emotions playing a part of that. When you're watching a tennis match and identifying with a player, or a display of skill they just put on, maybe it's possible to be blinded and take an unreasonable position.

Games change so dynamically with seconds being the difference between goal and near miss. If you are caught in heat of the moment, and asking yourself "is this the right time to place my wager?", you really need to know what you are doing, analyze the situation now, analyze if the odds are favorable now, predict what you think is going to happen in the near future with the game situation/odds--all of this almost instantly before the next game changing event affects the odds again.

In other words you have less time to think. Time could be your enemy. Every second the odds are changing as a match progresses. Whether they are changing in your favor or not has to be repeatedly assessed. When should you close out your position/hedge and guarantee a certain loss or profit, and when should you let the bet ride until the conclusion of the event? It just gets so complex as you're working against time... well, I guess it only gets complex if you make it complex.