nope, no time I send no more than 2 tweets/day from my only account which is built by hand one by one.
I check in on my twitter accounts once every couple of hours and I go back and read the previous 15 or 20 minutes worth of tweets. I also use TweetDeck, which allows one to set up search columns, so if someone tweets something that interests me, I see it without needed to scroll through old tweets
I think it is not a question. Yes, every day I visit it maximum time. Now-a-days Twitter is being more popular. It is important to very much. As far as my knowledge goes, most of the famous person visit this site as their internet site.
Alot of people are linked in to Twitter, Facebook, etc and every day they are up on what is going on in their network. I dont always read my tweets but mostly I glance over them and see if there is something interesting or new on there - something that catches my eye, is unusual or stands out from others. Its kinda fun.