I've had Black Minorcas in the past and they are excellent layers, laying around 5-6 white eggs per hen per week, and their eggs are typically very large compared to the of most other breeds. I wouldn't characterize Minorcas as being aggressive, but like most Mediterranean breeds, they tend to be high strung and flighty; a poor breed choice if you want lap pets. They are very good fliers as chickens go and if you free range them, some of them at least will likely roost in your trees.
Congratulations! It's always so egg-citing getting that first egg. :o) The eggs will get larger as she matures. Your Black Minorca will lay more, and eventually larger eggs than your Frizzle.