Another interesting thing about flying: certain areas of the game are only accessible by flying, so you definitely want to put in the grind for those aether currents. And in some areas, entire sections of the map are locked behind MSQ (ahem, SB), so you can’t get all the currents until you progress later in the story.
Each map in the Crystal Desert region introduces its own mount with a new movement mechanic, and the maps are essentially set up to require you have the prior mount to get each new one: Crystal Oasis: Raptor—can leap forward very quickly to cross gaps. Easy to acquire by doing a renown heart. Desert Highlands: Springer—can jump up high.
To get the Ley Line Glider achievement, you need to get to the Ley Line Overlook point of interest. It doesn't matter how you get there, so you can get a Mesmer buddy to port you up! Up Next: A
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