Can you tell me which are the pros/cons to having low blood pressure?

Sure: Pros -- you last longer and cons -- you can be dizzy or have blackouts -- now this is relating to natural low BP without meds.

Low blood pressure: Too much of anything is good for nothing. Hence there are no pros with low bp. Cons are you will feel dizziness, syncope/loss of consciousness, stroke or heart attack and in extreme cases it lead to death.