BobF
sharke
The French press makes a nice brew but a little bitter and sometimes you feel the sediment in it. That's why you need a coarse grind, so it can't get through the holes in the plunger. Of course the Aeropress uses a paper filter so you don't have that problem. A finer grind gives you more surface area and allows you to reduce the time the water is in contact with the grinds so reduces acidity.
The thing about the Aeropress is that there are all sorts of "recipes" about how to make the best cup. Some people like to "bloom" the grinds first by pouring a little hot water on them (I used to do this with the French press) and others like to use more water than required and stop the press before it pushes all of the water through. Believe it or not there is actually an Aeropress championship in which enthusiasts compete to see whose recipe gives the best cup. If you Google it you'll get some good recipes/methods to try.
One thing I was surprised about is how long you need to leave a kettle of water to cool it to the ideal 170F. The manual says around 17 mins!
I don't know about all of that, but after 3 as I described above (with Baileys) and a fresh piece of nicotine gum, I'm sweating like I've been at the gym and I've hardly even moved! 
If I have more than one cup within a 3 hour period I honestly get that feeling that you get (so I'm told
) when a drug like E or speed is just starting to kick in. That weird feeling that you don't quite know what to do with yourself and that you're going to explode unless you find an outlet for the electricity coursing through you.