Yotsuba is so enjoyable that i'm getting through them rather quickly for a change. A sudden increase in spare time may also be a factor...
The humour is definitely in full swing now after a bit of an iffy start in volume 1, although I can forsee some recurring jokes (for example, Jumbo's romance issues) becoming tiring if they go on much longer, but I can't tell if they will yet. My favourite chapter from this volume is a toss up between Yotsuba & Flowers and Yotsuba & Obon. In Yotsuba & Flowers I loved the way Yotsuba suddenly jumped on to the bus after learning it didn't cost her anything, and poor Fuka desperately trying to keep up on her bicycle. In Yotsuba & Obon however, I found the concept of Yotsuba the Flower Cupid hilarious, especially considering her outfit and her usual way of interacting with people.
And with that, on to volume 4!
Yotsuba Volume 3 is available from Amazon. ISBN 9780316073905.