Jekyll participates in charity-work and is community-minded, although it is implied that he engaged in some questionable behaviour when he was younger.
It may be that his original aim was to create a drug that could separate out the good parts of his personality to make himself a better person so he did in fact have good intentions.
He is very social and friendly, demonstrated by his tendency to hold dinner parties for his friends and acquaintances, however is also quite self-involved, contrasting Utterson's outward focus