I'm afraid I don't know how to create polls, so I'll ask this more generally. What is your favorite instrument? This question may seem quite general(perhaps it is?), but I think it really depends on what you tend to listen to.
Personally, my favorite instrument is the bass guitar. I feel very tempted to say the synthesizer, but I won't. This is because, while the synth is arguable the most versatile instrument (and almost certainly my favorite to play) , I wouldn't necessarily call it the most distinct. I think the bass quitar has a very distinct sound, which can always be recognized, regardless of the medium in which it is used, electronic, rock, or acoustic.