Being able to send myself a test eMail when creating an eMail campaign is very helpful. I did notice, however that the test eMail to use for the fields being tested, such as ID/Status, Industry, Phone Number, etc. defaults to the user's eMail. However, my contact may not have data entered into some of the fields that have been selected to merge into the campaign's eMail.
I would like to recommend that consideration be given to adding "Test Merge Fields eMail" be added to the My Account profile. If nothing is entered then the system would default to the user's eMail as it is now.