This is a huge pain in the ass. I have a GMail account I use for mailing lists, a hosted Apps account I use for work and my personal email is also on a hosted Apps account. It's impossible to keep them straight - the only thing that saves my sanity is Mailplane.
This is all combined with the fact that my personal Apps account appears to be half-migrated, and I see different documents in Google Docs depending on how I log into that account. It's insane.
This is the exact same setup I have; two hosted accounts and one gmail account. I had conflicting accounts with gmail + my hosted apps account, and merged them which created a bunch of issues (I was warned, I suppose)
I don't know if the personal choice of how we use our accounts is abnormal, but the resulting effect is definitely not something desirable.
This is all combined with the fact that my personal Apps account appears to be half-migrated, and I see different documents in Google Docs depending on how I log into that account. It's insane.