Every state does it a little differently. Some states you only go to be picked for one trial and if you aren't picked you go home. This seems most sensible to me. In other states, if you aren't picked you return to the jury pool and get called and called until you are picked or until the time period for you duty is up.
I've been on three juries. I think there is something about my profile that is ambiguous and makes both sides want me. In Houston, I got picked every time I was called except one time, and that was a civil trial. The other times were criminal trials. Nothing was serious. No really long trials. One was 2 days.
I think it's good for everyone to be involved in the justice system. It's serious, but it's not intimidating.
Also the chances of your being picked aren't great.
The chances of my being picked actually seemed pretty good
I went at 8:30 as directed, had my little orientation since I wasn't there yesterday. They only called in about 50 people that weren't there already yesterday. 2 of the judges with trials already had their juries, so they just went in, and the third was still selecting theirs, but they never took anyone else in. THEN luckily the rest of the cases for the day were settled
So they sent us home at noon instead of sending us to lunch
But I probably still have to go back tomorrow and Thursday until I'm used for one of these shindigs. All I did today was watch Let's Make a Deal and The Price is Right which is probs what I would have done at home anyway