In general, I prefer to give little credence to the chesscom analysis scale of blunder through brilliant as the free version does a very poor job on low depth, even by human standards, of rating moves precisely. With this in mind, often times brilliant moves aren't necessarily that brilliant. They are typically based on the fact they are the only winning move and outside of the top three choices at a very low ply. This causes simple obvious moves to be rated brilliancies.

But this isn't to take away the excitement from looking at your accuracy and finding one, it is only an alternative. A much better way to use this system, if you are looking for something to be excited about, is to see your book moves. Playing a game with even just 8 book moves is often hard for beginners as it relies on good play by both you and your opponent. A game with a high number of book moves is certainly good opening play and something to be excited about.