No. I just don't feel good about it (unless what I am saying is intended as a joke, even if it is a mean joke, although I only make such jokes with people that I know can take it). Maybe if it get something off my chest in the short term, like not helping someone who needs my help so that I don't have to do extra work, I might be glad of it, but eventually I'll feel a bit bad but I won't lose sleep over it. Usually sleeping gets rid of feelings like that, like an emotional reset.
That said I will go out of my way to be a twat to people I feel deserve it. Here is an anecdotal example:
My older brother (who is 20, by the way, keep that in mind) was playing MGS 3 on the 360, using my power cable because his is knackered. Then I asked to switch seats so that he could keep playing but I could play on the PC. After asking nicely twice, and less than nicely 3 or 4 more times, he stood up, screamed "fucking hell, fine!" at the top of his voice, threw the Xbox pad at me, kicked my PC and unplugged it, punched me and started to storm out. In the past he's always been a lot bigger than me, even though he's only 2 years older, and as a result has always bullied me into getting his way (this was not the first time this week - let alone in his life - that he had thrown a full on ***** fit for little reason). This time, however, I thought 'No, fuck this, I am 18 years of age and am not going to take this from a bitchy man-child' and promptly punched his face. Following this I decided that he could not take the cable back to Uni with him (even though my Xbox is long dead and I play PC now) and that I would do nothing for him. I now very rarely return his calls and only call him to be a dick or in an emergency. I have 18 years of being a complete arsehole to him before I'll be civilised to him. The point is that that punch I gave him made me feel terrific, because he deserved it, and every time I say "no" or "fuck off you entitled little ****" to him, I do feel empowered, very much so. But only because he deserves it.