I am frequently forced to fly from what must be the AA RJ world hub, and have come to appreciate the Embraer jets. I’m almost always in A1, 2, or 3, traveling lightly (one true 18” roll-on, one laptop and briefcase that fits under seat or overhead easily). I consider the jetway roll-on pickup very convenient, as opposed to the wait for someone to attempt to cram/retrieve all of their gear into an overhead on a larger plane (I’ll not discuss carry-ons here.
) I do prefer the Embraers over the Bombardiers (1-2 vs. 2-2) because my seat, however small, is mine in the A row. I’m of medium size, and have no problem.
I consider these planes quick and efficient. At many airports, you may be arriving at the far end of the terminal, so be sure to compensate for connections.
As Skye1 mentioned, the 777 is definitely in a different class, but I'll take my chances with an Embraer over an MD-80 or 757 on heavily traveled routes at peak hours.