I haven't watched anime in years. There was the cartoon network anime like Dragon Ball Z that started my exposure. I turned to the dark, sometimes disturbing, anime from the 80's and 90's, like Ninja Scroll, Ghost in the Shell, and Akira(I read the entire manga of Akira. It's better than the movie, I'll tell you that.)
Then other anime like Cowboy Bebop, Visions of Escaflowne, Beserk, Neon Genesis Evangelion, Samurai X, Princess Mononoke.
I'm fan of animation in general, but I haven't seen much lately. I'm tired of anime that feel generic or lacks character depth.
If you want anime with a deep plot and character depth like Ghost in the Shell, I'd suggest Ergo Proxy, Code Geass and Death Note. Also, since you liked Cowboy Bebop, there's an anime made by the same group called Samurai Champloo. Somewhat similar style in that it's an episodic action anime and like Cowboy Bebop it gives plenty of depth to the characters.
Anyways, onto the main purpose me coming to the thread, I just completed a couple of series; Onegai Teacher and Dual Parallel Trouble World.
For Onegai Teacher, I think it was actually kind of bland. It's a romance story between a half alien on Earth disguised as a teacher and a high School student. I couldn't help but thinking that the main two characters, Kei and Mizuhi, were idiots through a lot of it. In fairness it was mostly thinking that about Kei, but Mizuhi had moments like that too. Like Familiar of Zero, I ended up liking the background characters more, particularly Marie, Ichigo and Hatsuho. While I can't say a lot of good stuff about the plot, I will give it credit for the artwork. Everything from the backgrounds to the character design is really well done. The voice acting is pretty solid also.
For Dual Parallel Trouble World, I ended up liking it a lot more than I thought I was going to. It's basically a mech, harem anime. Which is a surprisingly rare combination. I think the only other anime that comes close to that is Code Geass, since they hinted as a possible relationship between Lelouch with Kallen, CC and Shirley, though romance wasn't as important in that one. Anyways, the characters in this are actually really good. I really like D who was just adorable. The mechs were pretty well designed and the artwork is solid. Also, that final fight is just so damn epic looking. I only had two issues with this anime. One being that at times, Mitsuki was, to put it bluntly, a bit too much of a bitch at times. Normally I kind of like the tsundere characters, but she didn't show much in terms of a good side. The second issue being
(Spoilers: don't read beyond here if you don't want to know the ending) that at the end, Kazuki didn't pick any of the girls to be with. I guess this is common for harem anime though.