Bugger another essay sorry. I should go bloody well back to uni
"Off the point here but I wonder if 18 is too young to go to uni?" Having been an older student twice I agree. Not just for appreciation but coping too, especially as soon all 18 year old students will be coming straight from school.
The younger ones I noticed were least able to cope (not just study, self discipline & commitment but also life basics like budgeting, laundry, housekeeping, personal admin [like knowing if their train pass/passport was due to expire], self care [hygiene yea, but also medical inc mh], knowing when, how and who to ask for help, making friends) were the boarding school kids who'd gone to schools where they were spoon fed and had parents who wouldn't ask them to do other stuff as 'it would interfere with their studies'.
Plus of course they'd start off shopping in waitrose (and buying all the brands their parents get) and learn by Easter they're better off shopping in the budget place on the industrial estate! 
Those who'd had part time jobs, were expected to do their share at home, were taught life skills, coped better which meant they weren't stressed out by things outside of studies.
Even students who thought they were being clever by getting a job that filled most of their non-contact hours ('I won't be a skint student') came unstuck as they learned the hard way they had to leave time for - private study, housework, downtime inc sleep! Ditto those who thought they could focus on advancing sporting careers via uni.
And the ones who'd had a year or more of working and also had no additional commitments (like dc), coped best, they sometimes had a little money saved and/or had been kept on part time by former full time employer, were organised, committed and could balance their life well.
Also real life work experience teaches you what you really want to do work wise (says I who was career changing
But applies for then/generally anyway).
It also gives you a distance from the way you learned/studied at school (many a time I heard from 17/18 year olds 'we didn't do it like that at school' )
Little things too -
the younger students initially thought it weird that I and other mature students sometimes had coffee/lunch/pint with lecturers.
They thought it was just a similar age thing but I've done that since going to college at 16!
It gives you the chance to get to know them, how they think mark which writers/researchers you're quoting they actually rate and those they hate and are sick of seeing quoted! (But are required to cover) It gives the lecturers an extra way to get to know you (personally and as a cohort) and what's getting across/isn't working so well way ahead of evaluations. PLUS
they are interesting funny people. (But I NEVER imposed I'd wait to be asked, or they'd see us in the coffee shop/pub and join us).
Some of us are still friends with past lecturers. Sadly one died at the end of our course, a few of us attended the funeral, having checked that was ok first. We were a bit worried they'd (the family) said yes out of politeness, instead they said they were so touched we went, that it showed the lecturer was cared about, not just respected/known.
Also the younger ones thought it was 'cheating' to proof read each others essays etc, when actually it's a really helpful thing to do. 
We often miss basic SPAG mistakes/weirdly worded paragraphs typing same word 4 times oh no never did that if we try to proofread our own stuff (especially when you're knackered and have read/rewritten same paragraph 2000 times!)
Students on same course/with similar knowledge can suggest secondary reading you might find useful but were unaware of 'there's an excellent article on theory X in journal y I'll send you the link'.
Sometimes just the way another student words things can mean a fact sticks in your head come exam time. (Once a theorist stuck in my head because a fellow student really struggled to spell their name).
Have to say my 1st uni (formerly 1994 group, top ten now for that course) had similar horrible attitude to non academic colleagues - no need for it.
Whereas my 2nd uni (fairly new, now top 20) the staff all got along really well and everyone was respected, saying that reminds me of an incident during orientation where a student made a remark along lines 'what would she know she's only a library assistant' lecturer virtually spun round and said
'for starters you treat EVERYONE helping you complete your studies with respect. From the cleaners, to catering staff to Deans! For another she's probably more qualified and with a wealth of knowledge and experience that she will kindly use to HELP you than you at this point can possibly comprehend'
Student sheepishly apologised.