I think that you lose the initial 'wow this is awesome'-feel at some point with EVERYTHING you do repeatedly for a longer period of time, it'll happen to every game you love, you might still like it a lot afterwards but you won't have that "I need to play this"-feeling. C-rpg has a skill requirement unmatched by most probably every game except for actual simulators, which will always make it attractive as a game to keep your wits/reactions sharp
I've always felt that c-rpg was just a means to level and try out specs though, for then to be able to play
Strategus. Never cared much for the FFA. However the current Strategus is plagued with a lot of exploiting and bug-abuse, no doubts that the new version will be much better though.
Stronghold also looks like an interesting mode
In either way, c-rpg seems to always be developing, changing, new maps, new modes, new items, new updates. That'll keep the game fresh but people will always have their 'favorite era' even so. Nothing to do about it, just personal preference.
As Tears suggested, take a break, anything you do too much you'll get tired of, same way as people discard music so quickly after having heard it on repeat for a week.
Everything in moderation.