When discussing large fowl breeds, my favorites are, hands down:
Welsummer - HUGE, stunning eggs, that vary from bird to bird. Some lay Marans-level darkness, while others produce terra cotta, or even light brown with dark splotches (akin to quail eggs). Not to mention personality...mine are obnoxiously friendly.
Marans - Who can argue with all the lovely colors they come in? And chocolate eggs, to boot? Perfection. Disposition-wise, some of the very best birds in my flock. Their natures run the gamut from hyper to calm/gentle. Can't meander anywhere without these ladies wanting attention.
Speckled Sussex - PERSONALITY! I find this single word to be the best breed description. My Mairead was a character and a half, someone (yes, she was a person

) who had no qualms about biting my lip if I stooped to her level, and came running when called by name. One can imagine how devastated I was when a hawk took her last year. A up-and-coming SS has been appointed to fill Mairead's position since.

Never has a more active, affection, curious bird graced this earth than little Rusty. Can't wait to share a similar bond with her.
Barred Rock - Biters, albeit the sweetest, most lovable chooks you'll ever meet. I simply can't list enough good about them to do this breed justice. Not only are they hardy, sturdy, tough birds, as well as proficient layers, but they're personable beyond your wildest dreams.

Perfect for children, too!
As for bantams:
d'Uccles - What's not to like?

I find them perfect in every possible way.
Old English Game bantams - Same reasons as d'Uccles, just a little less consistently friendly.
~Alex