I think prettying things up makes my planner more useful to me. I've never kept a successful planner as long as I've kept my current one and the bullet journal works as a great sidekick for it for me. I know bullet journals aren't for everyone, and it never worked for me as a planner, but it has been a great brain dump tool for me. I have definitely had to make adjustments to the original system to make it work for me though.
I wish I could successfully keep to do lists, calendars, etc. electronically but it's just never clicked for me. I do keep certain things in Evernote if I know I'll need to access them multiple times from multiple locations (recipes are a biggie on this one, but I also used to keep series lists and the Newbery list for my daughter on Evernote). There's just something about writing stuff down with paper and pen that helps me somehow. I've been looking for a long time for planner peace and I really think I've finally found it using my decorated weekly planner combined with this more utilitarian approach. It took me a long time to get here, and I may end up having to change things up eventually (I think I get bored too easily..lol) but for now this combination is making me super happy.