Then again there is the complete opposite of the 'Snape wants to kill Harry' school...
I present to you the 'Alan Rickm... ahem Severus Snape is a tortured misunderstood persona who is secretly an ultra competent wizard and father figure to Harry that uses logic and Elf magic' Cliche. See also 'Severitus'
This is usually combined with Snape having superpowers, an inheritance or some sort of secret that allows him to save Harry from everyone and turn him into the perfect Pureblood Prince while using strict - yet fair and loving - discipline to provide Harry with the boundaries and control he needs while taking on all the people who want to run his life.
The Harry Potter YMMV Tropes page has an extremely comprehensive list of the Harry Potter Cliches/Tropes - Canon or otherwise
I present to you the 'Alan Rickm... ahem Severus Snape is a tortured misunderstood persona who is secretly an ultra competent wizard and father figure to Harry that uses logic and Elf magic' Cliche. See also 'Severitus'
This is usually combined with Snape having superpowers, an inheritance or some sort of secret that allows him to save Harry from everyone and turn him into the perfect Pureblood Prince while using strict - yet fair and loving - discipline to provide Harry with the boundaries and control he needs while taking on all the people who want to run his life.
The Harry Potter YMMV Tropes page has an extremely comprehensive list of the Harry Potter Cliches/Tropes - Canon or otherwise