Latex: Boldface greek letters

I always come up with a new hack for this. Anyway, here is a list that you can just copy and paste. In fact this shows a couple of ways to do it.

\usepackage{amsmath}
\newcommand{\bbV}{\mbox{\bf V}}
\newcommand{\bbZ}{\mbox{\bf Z}}
\newcommand{\bbX}{\mbox{\bf X}}
\newcommand{\bQ}{\mbox{\bf Q}}
\newcommand{\bH}{\mbox{\bf H}}
\newcommand{\be}{\mbox{\bf e}}
\newcommand{\bU}{\mbox{\bf U}}
\newcommand{\bW}{\mbox{\bf W}}
\newcommand{\bbA}{\mbox{\bf A}}
\newcommand{\bbB}{\mbox{\bf B}}
\newcommand{\bb}{\mbox{\bf b}}
\newcommand{\bR}{\mbox{\bf R}}
\newcommand{\bD}{\mbox{\bf D}}
\newcommand{\bC}{\mbox{\bf C}}
\newcommand{\bY}{\mbox{\bf Y}}

\newcommand{\bvarepsilon}{\boldsymbol{{\varepsilon}}}
\newcommand{\balpha}{\boldsymbol{{\alpha}}}
\newcommand{\bvarpi}{\boldsymbol{{\varpi}}}
\newcommand{\bbeta}{\boldsymbol{{\beta}}}
\newcommand{\bdelta}{\boldsymbol{\delta}}
\newcommand{\boldeta}{\boldsymbol{\eta}}
\newcommand{\bxi}{\boldsymbol{\xi}}
\newcommand{\bGamma}{\boldsymbol{\Gamma}}
\newcommand{\bgamma}{{\gamma}}
\newcommand{\bSigma}{\boldsymbol{\Sigma}}
\newcommand{\bLambda}{\boldsymbol{\Lambda}}
\newcommand{\bPi}{\boldsymbol{\Pi}}
\newcommand{\bpi}{\boldsymbol{\pi}}
\newcommand{\bzeta}{\boldsymbol{c}}
\newcommand{\btheta}{\boldsymbol{\theta}}
\newcommand{\bx}{\boldsymbol{x}}
\newcommand{\bc}{\boldsymbol{c}}
\newcommand{\bd}{\boldsymbol{d}}
\newcommand{\bX}{X}
\newcommand{\bZ}{Z}
\newcommand{\by}{y}
\newcommand{\bu}{u}
\newcommand{\bTheta}{\boldsymbol{\Theta}}
\newcommand{\bz}{\boldsymbol{z}}
\newcommand{\bB}{B}
\newcommand{\ba}{\boldsymbol{a}}
\newcommand{\bA}{\boldsymbol{A}}
\newcommand{\bV}{\boldsymbol{V}}
\newcommand{\bv}{\boldsymbol{v}}