I found pruning and cultivating collections of 'good' twitter accounts just too much work for what it was worth.

The accounts are all run by human (well I hope they are) and all prone to the same problems that make me not like Twitter ...

At least most folks maintain some focus on the topic / decorum on their blog or in a random article. Most seem incapable of ignoring the attention you get from being a jerk or typical twitter drama and etc.