On a fun street car, no thanks. The advantage of a DCT is that it makes the car go faster. I completely agree, but going faster doesn't mean the driving experience is more fun, particularly on the street. Auto transmissions have dominated drag racing for years, but no one seriously argues they are more entertaining on the street.
I would seriously argue that a DCT is (depending on what car it's in). I like the manual transmission in the GT because it feels appropriate to the car's purpose and lineage. I don't think there's a chance in hell that a 458 Spider would be more entertaining with the top down if it had a 6-speed manual transmission than the DCT. I'm telling you, that car feels so ****ing out of control fast and brilliant going through winding roads that it's like finding religion. Being able to shift at any time at any point through twists and turns with the trans making the engine scream to the appropriate rev makes you feel like you are going 1 billion miles per hour and you may mistake yourself for Alonso in the rear view mirror.
+1. DCT is happy when matched with high revs. A real PITA around town.
Depends on the car. If I had a complaint with the 458 it would be that it's too boring and normal around town, and therefore not as exciting as a car like the GT on a day to day basis. They've really refined that trans to the point that it's as boring and seamless as an auto when puttered around. If I had to pick a car to drive up and down Woodward, it would definitely be the GT, and not because it's easier to drive, it's just more fun in regular driving situations.