I'm quite a fan of "Christ on a bike" too, and it's got the added advantage that it's unlikely to end in a disciplinary hearing.
We used to have an office to ourselves and it was properly sweary. One of my colleagues was renowned for the phrase "You fucking, cunting, useless piece of shit" when the database refused to save her work. "For fuck's sake" was practically the team motto.
Now a lot of managers from other projects hot desk in "our" office, and this week a load of dismal, straitlaced IT geeks have been allocated four desks in there. Swearing can no longer be raised to the level of an art form like it used to.
Favourite swears include:
Sodding bloody bollocks
Twattage (as in "What kind of fucking twattage is this?) syn. twattery
Knobjockey
Arsehole/s
And possibly my all-time favourite, a collective insult coined by a dear friend, "bunchacunts". The first time I saw it written down, I didn't get it straight away, now it just cracks me up.
Not a swear especially, but still a mighty fine insult, is "monumental bellend". Credit to James May for that one, even more kudos for accuracy as he was talking about that meathead Clarkson.