Likes:

• C
• Low-levelness
• Efficient code
• Optimizing for size specifically
• Minimizing use of strings in code
• Using booleans and integers interchangeably
• memcpy()
• malloc() and free() and variable-length arrays
• Allocating exactly the number of bytes I need, no more, no less

Dislikes:

• Bloat
• Object-oriented programming
• When an API performs extra unnecessary processes I did not ask for
• Using strings as identifiers for an internal element of a program (named IDs, function calls by name in the form of a string, etc)
• Allocating a fixed arbitrary sized buffer that 'should be big enough' (example char FilePath[1024];)
• strcpy() or strcat() when the length of the strings is already known
• Obnoxiously slow languages like JS, Python, and Ruby, or troll languages like Brainf***
• Char arrays and strings being distinct from each other