As a guy who's been playing Blazblue since Calamity Trigger, It's really worth it if you're into Anime fighters, the whole game is silly, It's overly anime (Yes, expect to see big boobies) with Japanese humor.
Although the 3DS port isn't the best thing ever shamefully, It's nice and I got it on my Birthday two years back.
Although if you get/have a PS3, I'd recommend Chrono phantasma, it's the newest installment.
yea i need to get that PS3 for the 3rd but so far i've enjoyed the 3DS port my friend has the 360 one and we point out the differences every time we see one.
P.S. we both love the rachel gag reel
Oh gosh, The Relius gag reel in Chronophantasma is quite humorous, It'd be worth seeing if you ever get it since I wouldn't want to ruin it!
Also Makoto's and Hazama's gag reels made me laugh quite abit in Continuum Shift Extend ;3; Ragna's too! (My sister loved it the most tho, being squashed by Tager ;3; )