I'm in the middle of mine, but I need to actually bother to go start Apollo Justice, Miles Edgeworth, and of course AA5 (which will be the 2nd time I've run through AA5).
Thing is, for this run, I decided to do something different - have my dad watch me do the cases, while I do the investigation phases on my own time. I was acting out the voices for all the characters in the trial, so it was a real challenge trying to fit all the voices in and remember them all. The female voices were the hardest because...well...I can't do them very well. Mia Fey was the only one I could really emulate. For Pearl I just decided to give her an impossibly deep voice.
However, I am not sure how I'd pull the run off with the last few games. My dad's favorite characters are, understandably, Wright, Edgeworth, and Gumshoe. AA4 only has Wright and he's in a very minor role (excluding the climax); MEI has Edgeworth and Gumshoe but there is zero delineation between investigation and 'trial', so that would be problematic; and AA5 lacks Gumshoe completely and Wright doesn't have that much air-time either - though he gets more than in AA4 and there's no medium there to save him (which my dad doesn't like).
So, what I'm thinking is, see how he likes AA4 (Apollo Justice), do MEI on my own, and then go to AA5 and see how he likes that. ...I need SOMETHING to play soon since I'm almost done with my current game project (Sonic Lost World), and I've been wanting to finish the AA run for a while.