opinionated

Short definition from Wiktionary

Verb

1. 1
   simple past and past participle of opinionate

Adjective

1. 1
   Having very strong opinions.
2. 2
   Holding to one's own opinion obstinately and unreasonably.
3. 3
   Infused with opinions rather than wholly objective.
4. 4
   Enforcing one particular approach instead of offering options and flexibility.