98 is better and ME sucks. The flaw is only when you use Remote Desktop. Which by default is turned off by Windows. So as long as you don't activate it or use it you will be fine.
Win95 sucked, 98 original was ok, ME was the worst thing ever to happen to the x86 area, 2000 was good but with too many service packs, XP is BIG and kinda slow on older machines, and 98SE is by far the best of all of them... GENTOO is GOD of OSes!