Eregion is also the zone that provides the most on-level content for me at the moment. Deeper parts of Angmar and Forochel have some, but I have to work harder to get to it and I'm just not as interested in those areas. Of course, questing in Eregion also opens up Moria and gives you access to legendary weapons ... in short, it gets you closer to Running With the Big Boys.
So my current plan is to base Maedhroc in Eregion for a while, long enough to get him through Vol II Book II, hopefully hit level 50 or higher, and get him started on his legendary weapon(s). From there it will be back to Angmar in order to continue with the Vol I book quests and his class quest, as well as enabling him to join those Rift runs that some of the kinnies are doing with Lhee's folk.
Maedhroc reeeeallly wants that Rift armor set! :-o___ <-- drooling
Yes, I want to eventually get to Moria too. But honestly, after skipping so much of the high-end content with Galadhalion, with Maedhroc I want to go back and do it all. Which means going through all of Angmar, Forochel, Goblin-Town, Helegrod, Sarnur ... heck, he'll probably end up going back and doing the starter content in Ered Luin at some point. Just because! Once he hits the level 60 cap, there's no reason to pick any one quest over another besides "Would it be fun or not?"