Play'n GO doesn't necessarily have some pattern that you can spot, but since it has no bonus buy, you'll get tired without wasting too much money. Unlike Pragmatic with its "deadly" bonus buy.
You'll notice the same feeling when you play other providers with normal spins (not with increased bonus chance, 2x bet, etc.)
As strange as it may sound from me but yesterday tried in normal spins in Pragmatic Play one of their new games Wild West Duels which has three type of bonus rounds and I loved every one of them (well the highest one I bought it as it never fell on the reels) as the other two bonuses felt relatively often compared to other Pragmatic Play slots and this had a unique pattern,at least that is what I spotted playing for over 2 hours with 0.20 usd minimum bet,in the bonus rounds you either hit it big with sensational wins or you barely make a penny and that was chaotic to say the least.However it is a sure thing for next week I will play this slot and forget about Play n Go for good hopefully.