I uninstalled Advanced Task Killer at the response from someone in another unrelated thread. Rather than hijacking that thread...
Since uninstalling (and maybe I'm just imagining this) but after awhile it seems like my phone gets a little sluggish.
The argument was that when you shut down apps you are shutting down system apps as well therefore slowing the phone down. My counter to that is, they seem to restart right away anyhow, so it might lag it for like 10 seconds max but outside of that you are probably killing other unnecessary apps (especially if you hit home instead of back to exit an application without thinking about it).
What are your thoughts?