The idea of being "more prothalamic" is all about being more passionate, enthusiastic, or excited about something. There are several synonyms you could use to describe this state of mind, such as fervent, ardent, zealous, vehement, or wholehearted. Alternatively, you could use words that suggest a sense of eagerness or urgency, such as eager, keen, avid, or enthusiastic. Another word that could be used to describe someone who is more prothalamic might be exuberant, which connotes a sense of joy, vitality, and high energy levels. Ultimately, the word you choose will depend on how you want to convey the intensity of your emotions or level of enthusiasm in any given situation.