I use QuickLook a lot and it is surprising how many options are available out there. Some of them are so useful that they should be shipping with the OS.
My most favorite is the option of selecting from QuickLook, which by default is read-only. You can change that using the following trick.
defaults write com.apple.finder QLEnableTextSelection -bool TRUE
My top favorites are:
And if you curse XCode a lot, Provisional profiles are your friend with QuickLook.
Your friend…better say you hate them less with that addon.
I hope they serve you well and if you don’t find what you want, you can build one using the template provided on Github.