Baguettes & brioche

and pretzels  :)

   Oh, I'd like to add that I never "returned" to commercial yeast, always had some around.  So I didn't jump off the boat with my sourdough tucked under my arm leaving myself to sink or swim with one method of raising dough.  Some breads just taste better with commercial yeast.  

Bagels

Several durum loaves are better with yeast than sourdough, e.g.  Tom Cat's Semolina Filone (in Glezer's Artisan Breads) Pugliese  (Barenbaum's Bread Bible)

Sandwich breads of all types

All of these can be made in sourdough versions -  it is just my opinion that they are better with yeast. 

Pizza's! Like Varda picks and the duram flour loaves made with packaged yeast have a lovely flavor...the 'sour' IMHO covers up the 'buttery' of the duram flour...my household favors the more unsour sourdough breads.

Sylvia

Pizza, ciabatta, focaccia, baguettes come to mind.

Sandwich loaves like "pain de mie" - although they can be made with a sourdough starter, usually they are not.  

and higher percent buckwheat bread (gets too sour).

Karin

I hate to admit it, but every once in a while, I forego my sourdough made with wheat and oat bran, and ground flax in favor of plain old white bread made with buttermilk and commercial yeast.  It rises to the sky and tastes absolutely fantastic for grilled cheese sandwiches, hamburgers or hotdogs.

sweet fruited breads like Raisin Bread, Hammelman's wholewheat,  hazelnut and current bread, Vanochka, Panetonne, etc  Pam

But make struan, focaccia, and croissants with *gasp* instant yeast!

I've tried all three with levain instead, but never liked the results as much.

I didn't ever give up yeast, and I still bake the majority of my breads with sourdough, but I'd say the top two are pizza and baguettes.  Sometimes I want baguettes and I want them tonight!