The Case IsNull Now

In SQL Server views I've been using CASE statements to look for nulls for years. I've just nullified this practice.

For the following Employees Table:
EmployeeIDLastNameFirstNameNickname
39CarterJamesJimmy
40ReaganRonald 
41BushGeorge 
42ClintonWilliamBill

Would be used to create the View:
EmployeeIDLastNameHandle
39CarterJimmy
40ReaganRonald
41BushGeorge
42ClintonBill

This is the CASE:
SELECT EmployeeID
, LastName
, CASE Nickname
WHEN Null THEN FirstName
ELSE Nickname
END As Handle
FROM Employees

ISNULLified by:
SELECT EmployeeID
, LastName
, ISNULL(Nickname, FirstName) AS Handle
FROM Employees