I prefer vocals. Doesn't matter the type of music, I find it tends to be a little better with vocals.

I think vocals inspire and can be sexy. Even if they're stupid it's all gravy, it still adds to the emotion of the track.

Actually depends on the tune,how the vocals and what they are.As there are tracks with vocals on that you just want to listen to without the vocals,and others that sound like something is missing.Really depends a lot on the track itself.

Not sure, there are a lot of good songs with and without vocals..

I don't see any big dichotomy between vocal music and instrumental music, be it electonic music or any other form of music. About 50% of what I listen to is instrumental music and it's definitely more of a challenge to write good instrumental song. In vocalese, lot of poorly composed music is saved by first rate singer and well written lyrics. Sinatra could make the dullest song sound superb with his brilliant vocals.

With instrumental music, be it classical, jazz, rock or lounge music, I think it's important to have musical hooks to catch the listener's ear. Bach, Beethoven, Schubert & Mozart wrote concertos and sonatas with more musical hooks than the Beatles. Even an experimentalist like Stravinsky used musical hooks.

One of the challenges to instrumental composers of electronica is to get out of the drum and bass groove and write more music that has substance, instead of industrial noise. People will remember a techno song like Future Sound of London's Papua New Guinea fifty years from now because it transcends the drum and bass sound and it's truly a well written piece of music with lots of musical hooks.

It really depends on the melody of the song, the structure. Some songs are made to a point where vocals are necessary. It also depends on how the artist structures his/her song, they could make it where vocals don't really have to kick in.

I prefer vocals because they help drive the song with melody with harmonies

with vocals
But it depends

something to keep things moving suits me, but no overkill

I dont like vocals. Vocals make me feel like they interfere with the rhythm.