A thing to remember here is that these posts are strictly meant for the particular planet position. Like, today we are looking at Venus in Leo, so the description given here may change for you if your Venus is although in the sign of Leo but with conjunction with or aspected by other planets.

So, lets see what Venus can do in Leo without any conjunction or aspect from any other planet. 1st lets see what these 2 things represent --

Venus is beauty, desire and love, liquid money, Venus is beauty, desire and love. Venus is the main significator of marriage. Venus represents girlfriend or wife for a man. Venus is the significator of all relations, may it be husband-wife or mother-daughter. Philosophically speaking, Venus is also the cause of all the sufferings in our life. How? Because Venus represents our desires and we get pain and suffering in our life only when our desires are not fulfilled.

Leo is 5th sign of zodiac belt, hence it represents the things associated with 5th house of horoscope like Love, Creativity, Arts, Being on Stage etc. Besides that, Leo is basically the Lion. This is the sign of feeling like King or Queen. Also, it is a sign of independence, Confidence, Ego, Self Esteem etc. Leo is consisted of 2 and half Nakshatra namely Magha, Purva-Phalguni and Uttara-Phalguni. Leo's lord is Sun.

Now, the planet of creativity is coming into the sign of creativity. So, obviously this person is going to be a very creative person. But more than that this person seeks for attention and appreciation. They want to be at center-stage and want people to take notice of their work/creativity. It is very important for them to get appreciation or attention because that's what builds their self-worth. For lovers and life-partners too, they look for someone who is equally creative  but here is where things can go wayward. As Leo is ruled by Sun, such placements can lead to ego battles in relation. Another way of saying the same thing is that Leo's lord is Sun and Sun is all about Fire and that's where the gentle planet Venus feels heated and burnt and relationships suffer. For relationship, they should keep an attitude of letting go of ego else relations are going to suffer. Creativity-wise, we can say it is best placement.

Now, the impact of Venus will depend on Venus' position in a particular Nakshatra. If Venus is in Magha Nakshatra, then Ketu's position will decide the functioning of Venus in Leo as Magha's lord is Ketu. If Venus is in Purva-Phalguni Nakshatra, then it is in its own nakshatra, hence better position. If Venus is in Uttara-Phalguni Nakshatra, then Sun's position will be deciding Venus' impact.

Also, as Sun is Lord of Leo, Sun's condition will have the highest say on Venus' impact in Leo.