Hi Canada Mark,
Basically for me, my biggest issues with my crohn's colitis is urgency and frequency...when it's really bad (which is more often than not) I get severe lower back pain, excessive bloody mucous (but not necessarily with every trip to the can) and gassier which also comes and goes.
I struggle with excessive anal pain due to the perianal crohn's skin tags and probably because my stools are mainly formed (even though the form can vary quite a bit from lots of long skinny or short skinny stools, to normal looking, to short or fat long ones...it's quite a mixed bag of crap actually all in one day)
When proctitis arises on top of the crohn's colitis, everything gets exasperated that much more, plus the feeling of tenesmus.
All in all, I would say my worst symptoms are the urgency and frequency equally, I could easily live without either of them and not even care what my poops look like coming out or even if they hurt a bit, it's the going so often and not being able to hold them in/control them that has drove me off the deep end.
I'm always flaring to some degree, have never been in a full remission in my 22 years with this disease, it's just that sometimes I have all the above symptoms I mentioned and sometimes I have a few of them but the urgency and frequency has remained the same throughout the last 22 years of being sick.
It is true about surgery, with CD at some point after surgery CD will appear somewhere else in the GI tract, which is what makes having CD a lose-lose situation.