Zero no Tsukaima, Sora no Otoshimono Recommendations
If you like ecchi-based comedy, then you would definitely like the other one. They both contain lots of ecchi stuff and a bit of harem.
What can I say? Both of these animes cover EVERY KNOWN genre possible. They both have ecchi, romance, fighting, super-power, magic, and I could go on forever. If it exists, BOTH of these animes have it. There is something for everyone in each of these, and that goes without saying that the plots of each of these is SUPERB. To boot, each has at least 2 seasons, totaling over 25 episodes each, plus OVAs.