I tend to use either Cisco Nexus Switches, Cisco Catalyst switches, or Cisco Meraki switches. It just depends.
If the DC is only used say 18 hours a day, and scheduling in outages for regular firmware upgrades is not an issue then I'll use Meraki.
If the environment needs VRF, or has complex routing requirements then it'll be a Cisco Nexus or Cisco Catalyst solution. If the environment needs absolute 24x7 uptime then I'll probably head towards a Catalyst chassis solution with dual supervisors.