Maybe the reason why you feel different after you get blackwall since your rim is black to make it looks too much black and maybe you want to change to chrome and only if you want to.
Give yourself a week or so to get used to the new, better look of the blackwalls. Whitewalls, either wide or narrow, are just TOO retro even for an EG.
I run BWs on all my vehicles (well the 'burb has raised white lettering). I just hate spending the time to do all the crap to keep them clean, especially on the bike. Plus, on an Ultra Classic, between the twin front rotors the fender trim, the bike being lowered an inch, and the luggage, etc. you can't see enough on the wheel and tires to worry about it. However, I will admit I like the very thin WW on my buddy's 2010 RK.
I'm fond of the WW's on my bike, making it kinda retro looking,but the blackwalls look good on your bike. do what you like! You have E-3's now so wear em out!