Depending on how long ago you bought your last pack, the rarity distributions may have changed since then. It is now standard to get a 'reverse' holo card in every pack (where the whole card except the picture is holofoil), and there is also a better chance of getting a regular holofoil now than in earlier sets. For example, you could buy six packs of fossil and not get any holofoil whatsoever, whereas six packs of call of legends will guarantee you six reverse holos and probably at least one regular foil as well. Prime cards are also a LOT easier to pull than ex cards and lv X cards, in some diamond and pearl sets you would get only two lv X cards per entire booster box, where primes in the new sets can be 5-6 per box.