Best Practice to Differentiate Accounts while configuring sharepoint 2010

Hi Guys, hope you doing great. 

Rather to keep same account for all the required services, I have try to differentiate all the accounts. i have mentioned purpose of the account as well. It will improve scalability and reduce complexity and vulnerability of the over all farm.

No.	Account	Purpose
1	Sql Server Service Account	Run SQL Server Processes
2	Setup user account	Run installation & SharePoint products and technologies configuration wizard
3	Server farm account / database access account	·         Configuration & manage server farm. ·         Application pool identity for central administration website ·         Run SharePoint foundation timer service
4	Search service account	Run search service
5	Content access account	Used to access content sources for crawling. Defaults to search service account.
6	Application pool account	Used for running IIS web application that host SharePoint site collections.