General

accel world and white album

I've watched all 3 and the only one worth watching is WA2. If you want to watch Zettai Karen Children, just skip to the last episode to watch that 5 second cameo HotshotGG makes. It's the only highlight of the show.

did u see the first wa i was hoping it had a school days ending but wa2 is the best to watch out of the three

White Album 2 and accel world are worth watching but zettai karen is a waste of time.

WA2 for sure.

I actually wasn't a big fan of any of the 3 titles you mentioned. I'll probably give WA2 another shot down the road, though.

white album 2 , the others arent as good

White Album is definitely the best of the three in terms of quality. Accel World suffers from serious plot holes (and bad writing) and the last... wow. I don't even remember it tbh. So can't say much.

I haven't seen Zettai Karen Children, so I can't actually do a comparison of all three shows. I will say, though, that White Album 2 is my favorite anime. However, I don't know what your tastes are or we might have different tastes, so I'm not exactly sure if you'll have the same opinion as me if you watched it. I'll just say that it is a great realistic romance with well-written flawed characters. The atmosphere is generally calm, though, so if you need something exciting/action-packed to keep your attention, then this anime probably isn't for you.

I like how White Album 2 starts after finishing the first.
Sadly, that is the only one of the three I can recall even though I've watched them.