I must agree, Strawberry Marshmallow was a nice little series. As long as you don't go into it expecting too much in the way of character development etc then you will enjoy it.
So far this season's worth of stuff has been a mixed bunch.
Working'!! - More of the same from the first series, so it all depends on how you felt about the first series. I enjoyed it and I must say the opening is just as good as the first series one. I wish I enjoyed all openings and endings as much as this.
Ben-to - I really expected for me to just watch one and no more but it has ended up being not as bad as I expected. Been carrying it on but it certainly isn't that brilliant.
Boku wa Tomodachi - Very similar level to Ben-to though I do prefer this to Ben-to.
Chihayafuru - Been really enjoying this, who knew an anime on a card game could be this entertaining. Can be quite touching at times and I find myself feeling for the characters. Well worth a watch.
Mashiro-Iro Symphony - I didn't expect much from this anime either, but this has become one of my favourites. It is a romance/love triangle style anime, which I tend to enjoy. If it is your sort of thing then I'd give it a go.
Shinryaku!? Ika Musume - I loved all the puns and jokes of the first series and I was so happy to find out the second series still has all of the same style jokes going on. Always gets me laughing through it.
Tamayura Hitotose - An alright anime which just seems to try and make you feel sad for the characters. I won't exactly miss it when it is finished.
Finally I have been carrying on watching both Idolm@ster and Mawaru Penguindrum. Idolm@ster is so-so, just a 'filler' anime to watch, it can have some good moments but overall nothing too special. Whereas I have really enjoyed Mawaru Penguindrum, hard to follow I find at times but it has me hooked. Oh and I don't half love those little penguins and what the get up to. Sometimes you have to rewatch a scene just so you can look at what the penguins were up to in the background.
Overall that's about all I have been keeping with this season.