Can you use overlapping iTunes and iCloud accounts?

Question

Apple IDs are fun, yes?
The situation:
I'm slowly upgrading two (2) Macbook Pros with Mountain Lion, and I've run into the problem of two members of the same household tied to the same Apple ID for iTunes purchases.
I've read all the tech support articles and tutorials for saving the iTunes Apple ID and then adding two (2) more Apple IDs for iOS and Mac OS X iCloud services.
I'm wondering if I can avoid juggling three (3) different Apple IDs by having some overlap.
Here's the current setup:
Spouse
iPhone 4S / iOS 6
iTunes tied to Apple ID #1
iMessage using phone #
No iCloud setup
Macbook Pro 13" / Lion
iTunes tied to Apple ID #1
No Messages setup
No iCloud setup
Me
iPhone 5 / iOS 6
iTunes tied to Apple ID #1
iMessage using phone #
No iCloud setup
Macbook Pro 15" / Mountain Lion
iTunes tied to Apple ID #1
No Messages setup
No iCloud setup
My question is -- since Apple ID #1 is technically my email address, can I use it for both the shared iTunes purchases and my iCloud account?
The revised setup would be:
Spouse
iPhone 4S / iOS 6
iTunes tied to Apple ID #1
iMessage using Apple ID #2
iCloud using Apple ID #2
Macbook Pro 13" / Lion
iTunes tied to Apple ID #1
Messages using Apple ID #2
iCloud using Apple ID #2
MeiPhone 5 / iOS 6
iTunes tied to Apple ID #1
iMessage using Apple ID #1
iCloud using Apple ID #1
Macbook Pro 15" / Mountain Lion
iTunes tied to Apple ID #1
Messages using Apple ID #1
iCloud using Apple ID #1
If it's easier just to create Apple ID #2 and Apple ID #3 for iCloud and messaging stuff, let me know. I'd prefer to keep it simple, though.
Thanks,
IronChefMoto

Answer 1

Winston Churchill wrote:
Yes, you can use your existing ID for both iTunes and iCloud, while your spouse uses it for iTunes and has her own ID for iCloud.
If I decide later to initialize a third (3rd) Apple ID for my own iCloud materials, how does that effect my iMessage (iOS) and Messages (OS X) history / experience?  I guess that would have other implications for any data stored in iCloud on what we've been calling Apple ID #1, wouldn't it? Beyond just the messaging components?
Thanks,
IronChefMoto