Why does my homemade sourdough bread always have a strange, unpleasant flavor that's hard to describe, and how can I perfect my recipe?

I totally feel your frustration, friend! I've been there too, and I'm happy to help you troubleshoot the weird flavor in your sourdough bread. First off, let's talk about the starter - even if it's been fermenting for months, it's possible that it's not quite healthy or active enough. Have you tried feeding it a mixture of equal parts flour and water, and letting it sit for a few hours to see how it responds?

As for the flavor, I'd suggest experimenting with a few different types of flour to see if that makes a difference. Some people find that using a higher-protein flour, like bread flour or all-purpose flour with a high protein content, can help to reduce the metallic flavor. You might also try adding a little bit of salt to your dough - salt can help to balance out the flavor and bring out the sweetness of the bread. And hey, I know it sounds crazy, but have you considered the type of water you're using? I've heard that using filtered or bottled water can make a big difference in the flavor of your bread.

As for storing your sourdough starter, I'd recommend refrigerating it and feeding it once a week. This will help to keep it healthy and active, and prevent it from drying out or developing off-flavors. If you're planning to take a break from baking for a while, you can also consider freezing it - just make sure to feed it one last time before you put it in the freezer, and then store it in an airtight container or freezer bag. When you're ready to start baking again, just thaw it out and feed it a few times to get it going again!

Hope these tips help, and happy baking! Don't give up on your sourdough dreams - with a little patience and experimentation, you'll be making beautiful, delicious bread in no time. Good luck and happy baking!