If you do wish to pop back in the future, Will mentioned above that importing deleted or glitched a few accounts and he could try to help, but you don't seem too interested.
The very original site on phpbb annoyed me slightly, the SMF one was "all right", they didn't want to install mods to add new functionality so purchased vB. I understand your feelings to a small extent, I don't have enough experience with other paid forum/etc software to make a valid judgment though.
I don't think there's much to get used to; maybe a few buttons are located differently and the colors have changed, but it's easy to ignore using blogs and articles. Then again, I have a friend who feels the same way toward these types of changes when I'm rather indifferent. Wish you the best.
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