Now those were the days of real quality animes. From Argento Soma to Rah-Xephon.. I can recall being a big anime freak during that time period cause I was only 13 or 14 years old. I mean it was the time of mechs and big explosions and all that drama that caught my eye. Animes in the early 90's finally coming out on dvds (like Escaflowne and Evangelion).
I think War-mecha animes died right after the FMP series. Sure there's Gundam00 but I'm not sure if it'll hold that trophy like the classics have. It's there but not all the way. As far as Gurren Lagann goes, I couldn't get into that shit after the first episode. Many of my friends were telling me its annoying and Taku Iwasaki (one of my big time favorite composers responsible for Kenshin, Read or Die ) changed his shit up a bit. I didn't even notice his work at all in the first episode which turned me off so I didn't bother wasting time in it. Then someone else points out to me that there's an annoying song in that anime so I won't bother talking about it. But on a real note, I can't really enjoy mech animes like before and with that type of genre, it requires great music. After 2k4, there was only too little gems that were less annoying to look at but interesting nonetheless.
The only anime saving me from not watching anything is really Kateikyoushi Hitman Reborn. It grasps that old feel the other classic animes had. I heard a rumor that they will stop production after the current arc that's airing right now. Really sad since the current arc in the manga has turned the story from comedic-action to drama,action and less funny. So if you want to check out an anime. Check hitman reborn but when the recent anime arc finishes, get to the manga and start from beginning to the ongoing chapters. It's very popular in japan but I only started watching the anime because of playability advantages in a certain game. After watching the first episodes, it was more than that

. The OST's (Toshihiko Sahaashi - known for his great work in the BigO) are very good but they tend to get a little boring in the later episodes cause they were used constantly. That is probably another reason why production of the anime might shut down afterwards. Give it a try
Jam it back in, in the dark.