I prefer the old skool look as well...
All my BKPs are covered.
Mules, MQs, and Riff Raffs - none of them are dull or mushy (and I'm a strat/tele man really :lol:). I can't tell you what they sound like without covers, but I understand that BKP wind them knowing whether they're destined for covers or not... (mebbe have a word with them if you're worried).
I'd say go with your gut feeling/preference, you know it makes sense :D (I'm not sure an uncovered MQ is even possible or that attractive?!)