(1) Lust/lechery (luxuria): excessive sexual thoughts and desires. Corresponding virtue: chastity (castitas).

(3) Greed/avarice/covetousness (avaritia): excessive desire for wealth, status and power. Can result in betrayal, treason, bribery, corruption, trickery, deception, theft, violence and murder. Corresponding virtue: charity (caritas).
All these first three "sins", if taken to excess, may be considered self-centred, lustful appetites, demonstrating a lack of self control which can be dangerous to self and others.
(4) Envy (invidia): closely related to and often resulting in (3) greed. We are certain to cause ourselves torment and may also hurt others in our envious thoughts and pursuits. Corresponding virtue: kindness (humanitas).
(5) Sloth/acedia (socordia/acedia): or laziness, neglect of duties and responsibilities, listlessness — which may lead to melancholy, despair, depression, misery or even, in extreme cases, suicide. Corresponding virtue: diligence (industria).
(6) Anger/wrath (ira): associated with feelings of impatience, hatred, lack of self control — and can lead to acts of revenge, violence, even murder. Corresponding virtue: patience (patientia).
(7) Pride/vanity/vainglory (superbia/vanitas/vanagloria): boasting, hubris, an inflated view of oneself, an unhealthy preoccupation with and love of oneself, narcissism, a condescension even contempt towards others. Bob Dylan called it "the disease of conceit" in his eponymous song. Corresponding virtue: humility (humilitas).
First of all, I suppose one could say that some of these "vices" are pretty good in moderation — I'm thinking of lust, gluttony and sloth in particular. Personally, I couldn't think of anything better than lying in bed all day eating, drinking and having sex. But to do that the next day, and the next, and the next? Perhaps not . . .
Secondly, a certain amount of anger and pride may be viewed as a good thing: anger at injustice may provoke us into trying to remedy the injustice; and if we have pride in our home, our family, our achievements — well, that can't be so bad, can it?
Even a little envy can stir in us a desire to improve our lives . . .
Though the more I look at these Capital Vices — which came to us via The Book Of Proverbs, The Epistle To The Galatians, the fourth-century monk Evagrius Ponticus, Pope Gregory I and Dante's Divine Comedy — the more I'm convinced they really are things to avoid.
I think what I'm really saying here is that a light sinful touch can be ok, even beneficial, but take that soft fingering to the level of heavy groping and you're in for trouble.