First, you definitely should send the crashlogs, including your email-address and any details you can give. It is very important for the engineers to know as much details as possible with these logs.
Second, it sounds like you have either a harddrive or media file problem. I would run Apple Disk Utility to check your media drives, and DiskWarrior if you have it. You also can unmount your media drive and load your projects to see if the timelines also crash without linking to the media files.
If then your timelines open fine, and if you checked your drives you can try finding out which media file is the problem. I would create a new project and open one of the offending timelines into it (without allowing the relink media automatically). Then create a new folder on your media drive, add that to the Projects media locations, and start moving media files into this folder and switching back to Media 100. Do you get a crash somewhere along moving files into it? Then you probably have found your bad media file.
Are there elements that are shared across your projects? Maybe one of those elements is the cause for the problems.