I like knowing, knowledge is my boon. But I like to make my in-game and battlers separate. I've done egg-bred runs before (Including a random egg shuffle where a bunch of people swapped eggs around) and sometimes it has its own way of spicing things. Probably wouldn't have used choice specs Tropius when beating up Platinum's E4 if it weren't for that.
There's also using stuff that's not competitive utility, grab stuff you like but sucks in a competitive standpoint. I plan on doing that with a flying monotype run at some point (Chatot and Emolga among the ranks, aw yeah)
With all of that said, I'd probably suggest your first playthrough be pure. Just so it feels completely fresh. And keep them separate from your competitively-trained teams. You may not have that nostalgia, but instead you have a different fresh experience coming from it. That's what keeps me playing, anyhow.
Dream ability hoarder extraordinare!
Breeding up dream world ability breeders on request since... whenever. Can't guarantee good IVs though.
Pokémon Black 2 Code - 5072 1749 8695