I really like scale sets. It lets you create and manage up to 1000 load balanced VMs per availability zone using windows or Linux images. (We can have flexible or uniforms modes for orchestration which dictates if you go down the homogenous VM route or a mix, where a mix is the flexible option.
There are many different family groups for Azure VMs each with its own purpose. Below is a summary of what can be selected. This is important because for example if you are running complex OLTP database servers then very likely you will go for Memory optimised machines, right? We know SQL server loves RAM. Any ways here is the list:
Lets write about Microsoft Azure, specially the area of high availability when it comes to virtual machines.
All About Data 