I apologize if I made you feel like that! I feel like my sweet spot is at 50-60.
It's not for me, it's for you and anyone else who feels like their wattage is a set thing. Don't limit yourself. The rule of thumb should simply be if you add more metal or lower the resistance at least try and up the wattage to see if it improves the experience as according to physics the heating element requires more wattage to get the same type of heat dissipation.
Ohm's Law describes our electrical system but Joule heating is what's happening in the atomizer.
Heat is proportional to the current squared times the resistance and time.
So over time it'll continue heating (that heat being sucked out by the vaporizing juice and air being pulled in). But if you lower the resistance then to get that same level of heat you need to up either time or the current (wattage basically). Also the mass of the object the current is passing through comes into play, think about pouring a cup of coffee or tea, a big thick cup will hold the heat better than the thing glass, it's not that they both aren't sucking up the heat, it's that the thicker object takes longer to heat up itself.
Now, with premade coils most are thinner wires all made pretty similarly, so yeah you'll have a pretty small range of sweet spots, but when you jump into making your own coils or using some fancier coils you'll find that the sweet spot changes dramatically.
That's all I'm trying to say. It just bothers me because people are limiting themselves for no reason. To me it's the same as someone saying "naw I don't like any pie other than Apple" "well have you tried Pecan or cherry?" "naw but I always get apple so that's what I like" silly right?
EDIT: and like you said earlier, don't apologize, you can't offend me, well maybe, but you'd need to be like a Hitler-esque militant vegan feminist trying to force your beliefs on me by using a bunch of 3 year old babies, puppies and kittens as their army sending them out to die (note I have no problem with vegans or true feminists, just the militant ones that become anti meat eaters and anti male rather than doing their own thing and simply promoting equality and good things, I support equality and respect vegans)