What is your favorite / preferable kind of lottery:
Active: you need to guess winning numbers your self (like 6/45 etc.)
If you call this as an active lottery, then I prefer this one. Since, most of my countrymen play lottery may it be 6/45 or 6/50+ depends on the prize pool and schedule.
One of the factor that interest people in active lottery is the affordability of the ticket. Passive ticket lottery may be expensive than the active one (from my personal experience here in my country)
Now, If you planned to put up a lottery business, why not do both? I guess it's both profitable.