I'll often say to customers who come into the shop, younger ones especially, make sure you're happy with the bat aesthetically first and foremost. If you can't get over the looks of the bat, branding, stickers and profile, then i don't think there's much point buying it as you'll never really be happy using it.
Then after that, grains etc depend on budget. I'll ask what the budget is and if it's G3 budget, I'll show them G3 bats. If budget isn't an issue, my next question is do grains and looks matter? If not, then I'll recommend a G2 or G3. If they do matter, then generally they'll go for a G1 regardless. My point being, any bat should perform so grading is not the priority.
What people don't seem to take into account is the quality of handle. Which is a hugely important part of any bat. Also, is the willow sourced from a reputable source, dried correctly, free from storm damage etc. Added to that, do you like the brand? What they stand for? Are you looking to support a UK batmaker etc?
Lots more to buying a bat than stickers and branding, but it is a major sticking point and very important, as essentially you wouldn't want to use a bat you didn't like the look of.