Sure, why not.
It's always changing but... *disclaimer - these are my opinions, and the only ones that matter, to ME. *
2 Megitsune - It's a really close second to Karate. Their "signature" song.
Awadama Fever - One of the best pop pre-chorus and choruses I've EVER HEARD! BY ANYONE! Ahhhhh, yeah, tondeke....
Syncopation - I haven't heard much of this one until recently. I don't know why but when I first heard in on sound cloud after MR came out I wasn't very impressed. Maybe I wasn't ready for my angels to grow up yet? But NOW, This is quickly becoming my favorite song. Look out Karate, you've got more competition.
Akatsuki - I think this is Su's BEST solo song. It's just amazing.
Here's where it get's tricky
From Dusk til Dawn - I consider this BABYMETAL'S artistic masterpiece. It's such a divergence from anything that came before it. I don't even know how to classify it. Kawaii-Atmospheric-World-Metal-Pop...? It's truly amazing.
GJ - I love the bounciness of the riff and the staccato lyrical delivery. This song embodies the spirit of BBM perfectly.
*** I'm already at eight? Really? Only 3 more left? 10 doesn't seem like enough***
Onedari Daisakusen - Another bouncy BBM tune. Yui and Moa are uber-kawaii on this track. It's a fun listen.
Catch me if You Can - My god, the payoff when that BIG chorus hits is irresistible. And, speaking of fun, this one live is the funnest thing ever....
*** Only one more? Uuuuugggghhhhhh....***
Ok, that's the best I could do. It's not an easy task whittling them down to 10 songs.