Tengen Toppa Gurren Lagann

This is an anime I was told to watch aaaages ago for it's utter madness and it definitely matches to that. In the distant future humans are forced to live underground and must constantly drill deeper to avoid the slowly decending ceiling. But Kamina isn't like every one else, he's been to the surface with his dad and now he's determined to get back, with Simon's help. However after their plan fails another means to get to the surface arrives and Simon and Kamina are free to roam the surface with Yoko, the sharp shooter who enables their escape. Now their on a mission, to stop the mechas called Ganmen at the very root to save the underground villagers from the earth quakes they cause. Simon controls the head of a Ganmen named Lagann while Kamina controls a body called Gurren. To fight off the Ganmen Simon and Kamina must combine to form Gurren Lagann with their fighting spirit to produce any number of drills. It's all one big joke really. But it has the boobs and the mecha to interest a large number of males even with the ridiculous speeches, pointless transformation scenes and inconsistent plot.

Neon Genesis Evangelion

That's right! I've finally got round to watching the anime of it!! Although I doubt you guys remember when I bought the Neon Genesis Evangelion manga only to discover that it's actually meant for people who had already watched the anime.

Quite honestly I don't think that me watching this anime was that smart, since I'm no mecha fan and I'm not a fan of older art style. But still I am quite impressed by Neon Genesis Evangelion! It's certainly not my style of anime and I'm not going to join the massive buzz surrounding it, but for what it succeeds at being what it is!
It mostly revolves around the high-tech military organisation Nerv. Buried deep under New Tokyo 3 Nerv holds some of the strongest weapons known to man which are used to defeat the powerful aliens/robots called Angels. Nerv's strongest weapon is a giant meccha suit which can only be controlled by a select few. The pilot has to be 12 years old and be able to synchronise effectively with the robot. They are called Evanglion's or Eva for short. Shinji Ikari is one of these select few and is called in to be a pilot by his father, head of Nerv. The story is then mostly about Ikari being a seclusive teenager with pointless meccha fights put in every episodes.

Buso Renkin

This anime is quite curious. It starts with a really interesting opening scene which made me immediately look forward to the episode (it's not often that the main character dies within the first 5 minutes of an anime), and the whole episode was just very well planned out. They inserted plenty of humour and just the right amount of cheesy-ness to complement well drawn scenes of monsters and fighting.
It's based around the concept of Alchemy and Homunculus (insert full metal alchemist reference her), in this particular plot Homunculus are the result of attempts at artificial life resulting in a man-eating beast and Alchemy is a special power used to fight of the Homunculus.
When Kazuki tries to save the seemingly defenceless girl, Tokiko, from one of theses deadly Homunculus he very quickly ends up dead. But, Tokiko decides to revive her saviour by giving him the power of alchemy.

Sky Blue

I think Sky Blue was amazing. It's an animated film set in a distant future after a catastrophic environmental disaster.  To escape from said disaster the 'elites' made a sanctuary named 'Ecoban'. Those who weren't elite where forced to live outside Ecoban and work hard to supply power to the city, as diggers. They were cruelly treated and over-worked, so, of course rebellion's would start.
The movie is based around one particular rebellion by an ex resident of Ecoban. The whole plot is actually quite long for an animated movie so you'll just have to watch it yourself if you want to know what happens. But I think it was quite good, there wasn't any particularly shocking parts. But it was entertaining.