It makes me so happy to find others who agree with me - liking instrumental stuff and voice as another instrument :D Most of my music is instrumental or sung in other languages. I do enjoy some songs that have lyrics, but the primary reason I like the song is always the music itself not the words.
For me I find that if I want to think about something I'd rather just read it straight rather than have it mingled with music, so meaningful lyrics for me are best just read by themselves where I can ponder them at my own pace. While I can appreciate things done with the instuments to match the meaning of the words, I don't really find that it enhances my understanding of them in any way, and is usually more on the lines of being distracting.
When listening to music I prefer to focus on the sounds themselves or to think about my own thoughts - rather than having the direction of my thoughts triggered by lyrics.
I don't really see the point in having nonsensical lyrics, but I also don't really care because I usually am not paying close attention to them anyway. Often it's hard to catch what all the words are as well, and somehow I seem to be able to sing along without really realizing what the words even are.
In some cases lyrics will conjur certain emotions which are meant to go along with the emotions communicated by the sounds - sometimes it makes the emotion more specific, but sometimes for me I find that the emotions are actually not the same: like if I just read the words I'd feel one way, and if I just heard the sounds I'd feel another - so the disconnect there can feel rather awkward. For instance there's this one song I have that doesn't even have lyrics but the title is 'Despair' and it just doesn't sound like that to me at all! I had to retitle it to what fit how I percieve the sounds ('Amour') so that I didn't have this wierd tug of war between two emotions every time I selected it.