It all boils down to what gives you the most drinking pleasure. Some people like it filtered & without any sediments. I know of a couple of guys who love sediment in their wines. Go figure. Some people like primary flavours with tons of fruit. Some people like dirt and poop. What I am saying is that there is no right or wrong when it comes to the issue of decanting. As long as you maximise value from your wine, who is to judge? General rule of thumb for decanting, though. If you don't enjoy sediment, try standing up the bottle 24 prior to serving. This is especially true for older wines or young unfiltered wines as they both have a perpensity to throw sediment. Decanting is often easier when the sediments are at the bottom of the bottle. If there is no sediment or you do not mind some in your vino, then pour a glass and have a sip. Great if you like the taste. If you don't, try decanting the whole bottle. As discussed above, decanting adds air into the equation thereby starting an irreversible chemical reaction. Most times it works, sometimes it doesn't. Hope that helps.