I very rarely have to restart. The three Times I have had to restart in the last 6-7 weeks were a result of the following.
Originally Posted by willthetech
1: I reset my network settings during one of AT&T's data outages to try and fix the problem, not realizing it resets the phone.
2. I tried to launch a download of an APPstore app via a link in an older version ("Click here to upgrade!") which for some reason cause the phone to restart.
3. I was uninstalling a cracked application which had not properly installed and it froze right after it tried to restart the springboard.
All three times, I simply connected the iphone to my computer and re-jailbroke with no issues in a couple of minutes. 2 of those three times were clearly my fault the phone restarted. So no, I don't find that I restart all that often.