The unskinned minimap, nameplates, and tooltip kind of stick out like sore thumbs. You should also change the font in the UIErrorsFrame and RaidWarningFrame to match the rest of the UI:
Code:
UIErrorsFrame:SetFont("Interface\\AddOns\\MyAddon\\MyFont.ttf")
RaidWarningFrame:SetFont("Interface\\AddOns\\MyAddon\\MyFont.ttf")
The unskinned player buffs aren't as glaring, but it's also not very hard to skin those, so you should probably just do it.
