In my mind, suspend is something of a hack to get around awful boot times, and it's still flaky for some users. It also doesn't help you at all when you have to install OS updates that require a reboot.
Sure, suspend has other benefits--you can keep all your applications open where you left off--but starting from a clean system often provides a better user experience, unfortunately. (Fortunately, some of the bigger culprits here, such as Firefox, have fixed their memory leaks. The Firefox-2-GMail leak really sucked.)