I started in 2D, once I got things worked out the first issue I had was pretty much boatmurdered. 6 cages in the trap but 8 big E's running at it, 6 get caught and my dwarves dash out to get them. A dwarf goes splat and leaves precious socks in the 1 wide corridor now packed with dancing E's. You all know how this ends. I also did pretty much the same thing in 40d a few times, only put 6 cage traps in on the elephant path and 8 show up.
Giant stone stockpile outside the door was something I insisted on having for a while too.
The biggest, most fun and memorable one for me though is the fort that taught me not to use my main corridors as booze stockpiles when there are fireimps about. Booze fires are impressive at the best of times, but this was my first serious fort and I had about 2000 booze in stock, all in a 5 wide corridor (2D version so it was the only corridor heading back into the mountain).
Fireimp turns up and is dispatched quickly with no wounds that I can see, but wait, what is this? the dwarfs (pig tail glove) is now a !!pig tail glove!!, what could this mean? To the wiki!!! Ohhhh dear, this isnt good, poor urist is on fire and nobody can save him. Quickly get a tomb assigned to the poor hero and forbid all his stuff. Its sad to see poor Urist doomed and we drink to salute his bravery but it is not a huge cost for the death of a fire imp. Raise your mugs to Urist lads, look at him, a true dwarf, skoalling his last moments away.... and falling over dead and burning RIGHT ONTO MY FUCKING BOOZE! URIST YOU STUPID FUCK! OHSHITOHSHITOHSHIT WHATTHEFUCKDOIDO? maybe it will all be ok? if I just ignore it maybe it wont set the booze on fire? no, no booze definately burns. Jesus look at that ripple effect its almost as fast as a dwarf can run..... no wait... looks faster.... yep, definately faster.
I think I lost about 30 dwarves to the initial explosion and then about 40 more to the next few hellish minutes. I sat and watched the goods stockpile outside burn for a while and then abandoned, the whole inside of the fort seemed to be on fire. I couldnt see anything for the smoke