General Negativity:
* Obsessive: Implies a fixation on something to an unhealthy degree.
* Relentless: Suggests an aggressive and relentless pursuit, often without regard for others' feelings.
* Stubborn: Indicates an unwillingness to change one's mind or accept new information.
* Inflexible: Implies a lack of adaptability and unwillingness to compromise.
* Dogged: Can have a negative connotation, suggesting someone is overly determined and fixated on a single goal.
Contextual Negativity:
* Pestering: Implies a repeated and annoying request or demand.
* Invasive: Suggests an unwelcome intrusion into someone's personal space or life.
* Clingy: Indicates an excessive need for attention or approval.
* Nagging: Implies a constant and irritating reminder or criticism.
The specific negative connotation will depend on the context and the speaker's intention.