I've seen a couple of episodes of Arpeggio of Blue Steel. Visually impressive, but very different stuff than Kancolle.
Apart the fact that I don't even understand the plot, I think that Arpeggio takes itself too seriously and thus lacks a fundamental thing: the fun.
For example, an episode of Kancolle is all about a cooking competition. The contenders:
1) Battleships Kongo and Hiei
2) Destroyer Shimakaze
3) Carrier Group 1: Kaga and Akagi
4) Carrier Group 5: Shokaku and Zuikaku
5) Heavy Cruisers Ashigara and Haguro
6) Destroyers Division Six: Hibiki, Akatsuki, Inazuma, Ikazuchi.
This IS ABSOLUTELY NO SENSE, but was hilarious!
---------- Post added at 11:43 PM ---------- Previous post was at 11:34 PM ----------
Speaking of cruisers.
A favourite of mine is the light cruiser, Arethusa class, HMS Penelope. Small, simple, fast, tough. I like also the name.
Another interesting light cruiser is our Giovanni Delle Bande Nere, one of the fastest cruisers in the world at that time (around 40 knots in the sea trials, if I recall correctly).