First off, I’m a fan of unique voices, and not so much manufactured voices, which is where a lot of vocal coaching (imo) tends to lead some people. For me, your ear is more important than the tonal quality of your voice. A lot of famous singers hated their own voices and had to be coaxed into taking the lead. If you know your intervals (your doe ray me’s! and can sing in tune, you’re 90% there. The rest is physical. (Breathing)
I’ve never taken voice lessons but have been around enough full time touring musicians to know what preparations to take to get through 2+ hrs of belting it out. For anyone only singing 2-3 tunes a night, it’s not as big of a deal. Thankfully for me, having played violin since 2nd grade helped fine tune my ear. Then add my 10,000 hrs of singing along w/ Beatles/Beach Boys records since I was a wee lad (and STILL GOING!!) that I can pretty comfortably hold a tune. Do I have a great voice? Not by far. But I know a lot of people w/ gorgeous voices that quite literally have mush for ears, and that’s an instant deal breaker imo. Heck, there are some “professional” singers out there that have made millions of dollars doing it but couldn’t sing something as household and simple as the Beatles’ Yesterday in tune a capella if you held a stun gun to their nads! <cough-Anthony Kedis-cough>
It’s great to sing along with something…but even better for ear training to do it without! One thing I sometimes do on my commute home…put on the Beatles channel on Sirius Satellite, start singing along with a tune, then turn the radio volume all the way down while continuing to sing, then turning it back up closer to the end to see how my pitch and timing held up.