I love all these games and everyone should find a way to try to play them, even if it's just the two "original" style games that were released state side(meaning no license issues due to lack a of characters such as Gundam, Mazinger Z, Getter Robo, Raideen, Combattler V, etc.)
I sort of prefer the Original Generation games due to the characters and mecha being otherwise unfamiliar and "new" ...you know, since most SRW games consist of a roster of 1970's robots...not to dis Mazinger Z or the good ol Gundams....
But seriously, check these games out if you can. They're typically lighthearted tactical style games and the best comparison I can make is to shining force(the original one) but only because I typically HATE most "tactics" style games...but for some odd reason I love SRW games.