I think you mean "neat" if I have my terms right. Neat = open bottle of booze, pour into glass, sip. A.k.a. "straight", but saying "neat" buys you more bar-cred. "Straight up" = shaken with ice and then strained. AFAIK.
But yes, neat is the ultimate way to appreciate fine liquor. Apparently you've made the "fine" optional! ;) Seriously, try the good stuff.