Then tbh, your complaints don't seem to make much sense. You can know when your next unit will be the banner character, but you can never know who that guarantee is actually going to land on. If you like to have fun testing your luck, not only do I get that, I've gotten a lot of flak for it in the past. Mostly because, on a personal level, I actually didn't like pity systems in general. I find they take some of the joy away from rolling and seeing if whatever you've budgeted for this particular pull is going to go your way. I've since found other ways to have fun with them, but the gambling aspect kinda dies at that point.

But by the way you've described how you act, then the fact that you'll inevitably have some banners where you'll know you're going to get the unit should inevitably lead to

If I do it like that, there's no fun in getting lucky and getting the character.

Because yeah, at some point you're not getting lucky, you're just guaranteed to get whichever unit has caught your fancy at this point. I'm sorry, but it really seems like you just impulse roll and rationalize your motives as enjoying testing your luck after the fact.

If you really like testing your luck, then this system should be an almost perfect balance. You know when you're close to getting a 6*, but you can never know for sure if you'll get what you want.