Best Ice Cream in Manhattan
I'm looking for, well, the title says it all...
Midtown/Times Square preferred, but will travel for goodness.
La Maison du Chocolat (in Rockefeller Center) is selling ice cream for the summer, which I find their flavors quite intense and delicious.
Sundaes & Cones in the East Village is quite good too.
If you're in the mood for custard, try Shake Shack's in Madison Sq. Park.
For gelato, I would try Cones in the W. Village, L'Arte del Gelato in Chelsea Market, and especially at Otto in W. Village (I highly recommend the olive oil coppetta).
Cones is a CH favorite, but I have been unimpressed at every visit. Their corn gelato has great texture, but is far too sweet. On my most recent visit a couple weeks ago, the gelato had too many icy bits mixed in, and was again too sweet.
Grom, much hyped by foodie enthusiasts, is pricey, and just ok. Staff are unbelievably slow, and the layout is not conducive to making an informed choice--signs tough to see, and gelato hidden away in metal cannisters.
Il Laboratorio di Gelato, which MMRuth recommended above, is flavor perfection. Alas, their hours are incredibly (frustratingly) limited.
I think you just listed my favorites in the city, Tina/chocokitty:
La Maison if you love (and you really have to love) chocolate (it is very intense)
Sundaes and Cones for Asian flavors
Shake Shack for custard (vanilla with toffee is my favorite, or one of the seasonal fall flavors like maple or apple brown betty)
Otto for olive oil gelato (with sea salt and watermelon!)
Additionally, don't forget that Il Lab has a counter in Whole Foods Bowery! They're open until 10pm.