Your in good company, Jesus himself was not thanked for his service all the time. I'm not trying to harp on the point, but trust me God sees your heart and knew what it took to play from sun up to sun down. You just have to trust that it wasn't done in vain.
Should people show appreciation, yes, do they always, no.
Trust me I know the feeling of not being appreciated. I went through a season when, when ever and wherever I saw a need in the church, if no-one stepped up, I would just do it. The only night I had avaliable for me was Monday Night, every other day of the week, I was busy serving. I was on the servanthood team, finance committee, Youth Ministry Leader (hauling folks kids all over town, spending my own money on them, etc), Men's fellowship, Church Tech support, Webmaster, Audio/Visual responsibilities, Praise Team, Evangelism Team, I cleaned the church, any repairs or improvement projects such as laying wood floors and the lot, I was right there heading things up. I'm sure there were a few other things I was doing as well, while building my own house, working full-time and finding time to spend with my family. The only person who told me that they appreciated me was my Pastor.
The Lord spoke to me one day, if you want someone to say, well done, great job. That's your reward. But rather you want me to say "Well done!"
I understand a little appreciation would go a long way. Just keep on pressing if it never comes. Count it a blessing that you are becoming the greater servant, in the Kingdom.