Is there a better photo application than iPhoto for managing iPhone videos and photos? I've been using iPhoto for my photos and videos.  However, it's become so slow, I'm lucky if it can download my 2 or 3 photos/videos when I leave my computer on overnight.  And then I have to often force quit iPhoto even after unplugging my iPhone because it just makes my computer unbearably sluggish.

I'd love it if I can solve this problem, but really iPhoto is not ideal for me anyway.  Backing up through dropbox is not seamless.  I need to create aliases and each computer needs to have their own folders and cannot share the organization.  The organization of the photos and videos is not great either.

I think I have pretty common needs for photo/video management.  I also love the iCloud photostream.  What's the best photo/video management tool?
The only other app on the Mac that can access photostream is Aperture. So your choices are migrate to Aperture - and that's even less designed with sharing in mind - or fix iPhoto. Performance issues like you describe can be down to a number of issues - Disk Space, Ram, bunged up caches and so on. What fixes have you tried?