Lmao ... 2ManyDogs, I know ... right ? 
Who needs a 2tb hdd ?!?!? Sighs, guess someone could always download a good chunk of da net if they wanna. Don't have much time to throw 2 cents in on this atm. Seems like partitioning schemes are in a big way a personal preference deal. May be as many schemes as there are gnu/nix users in the world. While also goes w/o saying some make more sense than others. Though you are free to find the one that pleases you the most.
Might look over ... this Something about using LVM and /boot location and that. Looked close enough to me, though am far from a guru.
Mainly agree with 2ManyDogs come to think of it. You can make things as crazy or not as ya like for sure. That's ALOT of drive space. Tend myself to slap everything on one partition per OS, #!'s got more than 10gbs, most other don't and still have plenty of room on those partitions atm. A shared partition, a shared ntfs partition too ... blahblahblah. Now for some odd babbling, like 2Many already noted anyway. Not tough to make a small partition for ea gnu/nix OS, guessing 8-10gbs should be plenty, then set up a shared partition they can all use. Should share the same swap w/o problems.
Would avoid formatting the swap everytime ya install summin new. Formatting the swap can change that partitions uuid and cause ya headaches, you'd have to correct in whichever OS's fstab to clear up. So tell x distro's installer NOT to format the swap during install kinda thing.
Additional babbling 2 include, sharing /home between distro's. Outright sharing a /home from what I understand is a BAD idea, config files will get mixed up. But it's no doubt poss from what I've seen ... More along the lines of using a shared partition for it. Google knows all, if we but ask it the right questions. Mainly just posting to perhaps help ya avoid the musical swap uuid problem mentioned above and fixing it in fstab if it does befall. Have installed many mucho gnu/nix OS's, even let the installer format the swap with no issue. But it has happened a time or two too.
Ya more than likely already know how to find the uuid's of partitions, if not ....
Should do it for you/folks. Also don't doubt if everyone followed hinto's advice thing, but alas the world is not perfect and there will be borkage, oh yes ! ... There will be continued borkage. Part of the fun of gnu/nix. 
vll ! and (CB). 
Last edited by CBizgreat! (2012-01-27 20:24:35)
Some common cbiz abbreviations. This will save me time and yet @ same time tell folks what the babble is supposed to mean.
Vll ! =
( Viva la gnu/Linux !) Vl#!! =
( Viva la #! !) Last but not least, UD ... OD ! =
( Use Debian ... or die !) 