Actually, Just found a thoughtstream item I dumped a bunch of Todo list manager features I'd like to see, obviously I've thought too much about this o_o;
Sounds like you're looking for many of the same things as I am. I tried all the usual suspects (including Trello, per the article), and none did what I wanted. I have actually been using Jira for personal task management for the past 6 months or so. It's pretty good, but it's Jira: slow, too many features, etc. It's still better than anything else I've tried.
> time decriptions; 'in an hour', 'every tuesday', 'third day of each week every third month of a leap year', 'within a day of easter, midnight' - some of these might be impossible/impractical - but make it easy to specify a date concept.