Advice to make Let's Plays interesting?

Honestly, if you are having fun with what you're making, it will come across that way to viewers and then they will enjoy it as well! If you lose interest in something, it's better to discontinue it and move on to something you find more interesting than to force yourself to keep going on with it. As for hating your voice, we've definitely all been there. I don't record my voice on my Sims channel, but when I started my other let's play channel, I hated my voice so much I almost quit before I really began. It will be awkward at first, but the more you record and edit/listen to your voice, the easier it will get to hear yourself! Sometimes it's still weird to hear myself, but I don't hate my voice nearly as much as I did when I first began. I guarantee if you keep it up, you'll feel that way too! Don't worry about being "boring," just do what you like and let your commentary come naturally ^_^