Gundam Build Fighters has one of the best recent OSTs that I've ever heard. I highly recommend listening to some of the tracks on your freetime, but some that come very highly recommended are (in no particular order) fairy dancespeed starAllied ForceSamurai-EdgeQuickAttack and all of the OP/EDs are great but I'd recommend wimp I'd get the other ones linked as well, but they seem to be great youtube take-down targets so...
AiRi did the first ED, Hyadain did the second ED and BACK-ON did both OPs.
I don't tend to skip the OPs/EDs unless I'm really busy because if it's a good OP/ED, I'll watch it 99.9% of the time that I can. (And now that GBF is getting a S2, I'm very excited to start to do that all over again this October!)
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AiRi did the first ED, Hyadain did the second ED and BACK-ON did both OPs.
I don't tend to skip the OPs/EDs unless I'm really busy because if it's a good OP/ED, I'll watch it 99.9% of the time that I can. (And now that GBF is getting a S2, I'm very excited to start to do that all over again this October!)