Thalassicus
Bytes and Nibblers
In the Vanilla Enhanced mod, which difficulty level do you find most enjoyable to play on a regular basis?
"... and usually just research whatever the lowest cost Tech is at the time, unless I am looking for something to counter another player."
There is a point when all techs you need urgently to get your empire started are researched, and it seems like most techs don't provide an immediate benefit (e.g. they allow advanced things like opera houses when you still don't have temples in most of your cities).
Finding stuff worth beelining to is a major midgame challenge for me, too.
I do try to always have a mid- to long-term goal, but the choice is more of a challenge when there are several techs scattered in-between that you don't really need. It's hard to judge what will help you most in 50+ turns.
Example: You beeline Keshiks as Mongolia. They will be your mainly produced unit for some time, and those cities that don't build them are probably busy building rather basic buildings. So what do you tech?
The lower branch with Iron working contains some nice other units and production boosters, but I usually don't need other units much (it doesn't mean much if you have swords or longswords if you reduce cities to 1hp anyway). I also prefer building units and have them conquer/defend rather than paying much for a building that helps me build them later.
The upper branch contains some science and culture boosters, but again, I won't have much space left in build queues for them. Ships are nice, but finding valuable islands or unsettled spots oversea is a gambling game at best.
To create a bridge to the original topic of this thread: I prefer a difficulty setting where I don't need to do calculations for an hour to decide what's the best next step, but to try a path and still have a chance to win if it wasn't the best choice.