Hey guys, first of all, I hope that this is the write section to post this in.
Okay, so I've been trying to come up with project ideas for a couple of days now. I've searched the web, but the projects that I find are a bit too... boring, if you know what I mean. I'm looking for something adventurous. Sorry if I'm being a bit vague.
Thank you. And happy holidays!
What are your other interests ?
Maybe you can find a project connected to them
Thank you for your quick reply.
My other main interest is computer graphics, which, unfortunately, doesn't really have anything in common with electronics.
No sporting interests that you could write a scoreboard for controlled remotely by a Web page or Android app ?
Unfortunately not. Any ideas? I feel bad asking for your help.
Build a system that will monitor your residence and send that info to your phone.
That's an amazing idea! I'm gonna try that, thanks!
Build a sensor that can identify/compare colours you use in computer graphics.
That's a great idea! I'll have a go, thanks!
This isn't a "real" project (although you could maybe make it so) but is a good one for integrating quite a few Arduino techniques. It's not trivial by any means.
I've worked on it on and off over the last week since OP there posted, it's almost complete, and was a very interesting one to do.
At the moment I'd lose marks, falling foul of the
Do not present just a breadboard full of parts
rule. (But that's easy to fix: stick the whole thing in a shoe box with a "Warranty void if seal broken" sticker 
)
It needs to be 100% delay()-less, else the progress bar and pause can't be implemented. Needs a bit of calculation for the water quantities: you can't just willy-nilly add hot and cold until the temp is right since the total quantity's limited. Motors, a servo. LCD. A keypad (thank goodness for the keypad library being able to handle events....) I'd rate this as a good project for anyone who wants to integrate a lot of Arduino skills into a more-or-less real-life state machine.
This is the the most Epic question that could be asked. Everyone here asks themselves this. as far as the experts go... the object is to dream up something that makes a difference and design something that you might get noticed for. Someones artistic ability to create new purpose for electronics is obviously the most appreciated in the the community. if you can ponder a way to design a time machine I would highly recommend going for it!
I disagree with most people's recommended learning process and i'm sure someone will disagree with my answer. Most people will tell you to pick something that is easy and familiar with your skill level. I say pick projects that are above your comprehension level. then dedicate yourself to learn whatever you need to learn and do whatever it takes to make it happen. though you might find yourself banging your head against the keyboard in frustration... if you stick with it... you will have learned something.
So i say build a time machine! no one will care(including me) if you designed a project that made a light blink on and off.
You should turn it around. It's not "I have an Arduino, what can I do with it?". The proper question should be: "what could I simplify in my life"? Preferably something repetitive.
Maybe you operate a greenhouse: every day you have to check temperature and water the plants. That can be automated, saves work.
Maybe you want to know when the next bus arrives: build a web interface to get the latest real time bus arrival times, show them on an LCD display. Then you know when to leave home.
Maybe you have a terrapin that, like mine, sometimes doesn't want to bask for days. I set up an ultrasound sensor to switch on the heat lamp when needed, but only between specific times - which are read from the Internet. Saves power.
Prevent the cat from drinking from the toilet bowl: build a toilet lid closer, which will push down the lid shortly after someone has used the toilet.
Lots of weird art installations that have moving parts, or colour changing lights, or that react to the presence of people that can benefit from a microcontroller.
Or just browse this forum, lots and lots of different projects. But the best project is one that's useful for you.
