Smoke: Would be great if the smoke would break up a bit more.
Rain systems: Reminds me of an old tutorial by Allan, looks pretty decent! Maybe some materials and lighting?
Text reformation: Effect looks pretty damn cool! Looks like you've used spheres, but it would look even cooler if you use very small facing particles and maybe a lot more particles?
Particle Galaxy: It's from the latest DVD by Allan mcKay, right? It's an damn cool effect.