What will you do first when you hit 100?

[Roshar]

These aren't in order:

Complete questing in all zones to make sure I have all followers that can be gained from questing. Also gives the treasure map of the zone.
Loot all the treasures for garrison resources.
Kill all the vignette/rare mobs for garrison resources.
Finish off all the bonus objectives on every map because I hate looking at the crossed-swords icon.
Proving Grounds and Heroics of course.
Challenge Mode quest once a day for LFR quality gear.
Do the garrison building quests, along with weekly invasions (preferably in a group).
Daily garrison group quest for 1000 apexis shards instead of 800.

[Celista]

Take a nap.

[Onslaught49]

once i hit 100 on my warrior im gonna make sure i have enough supplies to build town hall 3 and barn 3, then send my ppl on missions to lv up while i switch to my alts and get them to 100 so have more barns

[Lord Havik]

Get 100
Grind garrison
grind gear
????
Profit

[Razorice]

spam HC's/Challenge modes (If possible) to get full HC.

[Tjaz]

PVP all day.