The main purpose of learning a foreign language is to use it for meaningful and effective communication both inside and outside the classroom. This paper is devoted to identifying the main communication difficulties faced by EFL students at King Khalid University (KKU) and exploring the reasons that lie behind these difficulties. The paper investigates the participants' willingness to communicate (WTC) in English when they have an opportunity and highlights the personality traits that affect students' oral communication in English. To this end, two types of instruments were used: a questionnaire and a semi-structured interview. Both the questionnaire and the interview attempted to measure four types of communicative contexts (public speaking, meetings, group discussions and interpersonal conversations) and three types of interlocutors (strangers, acquaintances and friends). The findings reveal the EFL students' WTC in English at KKU and how their personality traits affect their WTC. Moreover, the paper suggests some recommendations for overcoming EFL students' unwillingness to communicate in English.