I just went to fill in my contact details, and it seems a little insane needing every gamertag/name twice or more
The list goes as follows:

- Jabber
- Nintendo Network ID
- Steam
- Xbox Live Gamertag
- Origin
- PSN Account
- 3DS Friend Code
- Xbox Live (duplicate of Xbox Live Gamertag above)
- PSN (duplicate of PSN Account above)
- Steam Profile (Duplicate of Steam above)
- Twitch
- Youtube
- Minecraft
- League of Legends
- Destiny System
- Destiny (duplicate of either Xbox Live Gamertag or PSN Account above, depending on the choice of Destiny System)