Sunny,
Porsche's Tiptronic "paddle shift" is NOT a sequential shifter like the ones on F1 cars, Ferrari 355, Ferrari 360, and BMW M3s.
It's merely an automatic dressed up in paddle shift style. Everyone else with their steptronics, tiptronics, e shifter, whatever it's called are merely fancy automatics.
I personally never driven a car with a true sequential shifter. However, the shifter is designed for track use, where you have corners that you have to pay attention to. For relatively straight city driving, yes maybe a paddle shift would be boring.