It's been agreed upon that we have three types of ADHD:
It is speculated that inattentive type is a different beast from hyperactive/combined: Is the inattentive subtype of ADHD different from the combined/hyperactive subtype? - PubMed
The significant differences found between the ADHD/CH and the ADHD/I subtypes raise the possibility that the two may be separate disorders.
This is the one I identify (self-diagnose) the most with.