Oh I definitely use the ambiences for everything lately, they help me focus somehow. I get bored very easily so it's nice to have some music that's not distracting, also I roleplay to do some essays so it's a good way of tricking myself haha. I love the Gryffindor Common Room from Ambient Worlds for that! Sometimes I use the Star Trek ambiences ender4life makes too. Although I have to say, if it's a particularly gruesome piece of work I use the Studio Ghibli piano collection. I've written so many last minute essays to that one, sooo many all-nighters *sigh*.