Sure, but wouldn't it be better if it's actually used? A tumblr clone is probably too much work for an eventual ghost town. You can pick more focussed projects

Sure, but wouldn't it be better if it's actually used? A tumblr clone is probably too much work for an eventual ghost town. You can pick more focussed projects that solve a small problem really well - in that way, you have a chance that's actually used. For e.g. a chrome extension for something that has always bothered you.