Hello there, FLY777UAL!
I've been on American Eagle's ERJ-145's a number of times between ORD and CLE, also to/from CVG. I have always liked them as its the closest I've ever come to flying aboard a bizjet.
I'm lucky I'm only 5' 9" tall so I can stand up in the aisle with no problem but it's close! I find the seats comfortable enough but they are narrow...seemingly narrower than those on an MD-80 or 727.
One thing I do not like is sitting at any window (even though they're large and offer a good view) because you're very close to the sidewall and it curves rather sharply into the floor. So, if you're in an "A" seat, your left foot has little space; if you're in the "C" seats, it's a problem for your right foot (at least I find it so). So, I always try for the "B" seats. That's really my only gripe about the "jungle jet" and, I have to say, I like it much better than the CRJ which I have flown on with Comair.
I will say that on one flight from ORD to CLE we navigated around some huge thunderheads and it was obvious that maneuvering the ERJ-145 was a dream compared to a larger aircraft. What response to the control surfaces! Bet it's a blast to pilot one of them.
Have you flown on the ERJ-145 or -135? Care to share your impressions?