Classic or 1.5

I'm not sure if there's already a thread on this topic or something, but when I searched for this I only found the terms 'classic' and '1.5' in posts, rather than subjects for threads. So I'm curious to know which of the two versions you guys prefer. I personally prefer 1.5 by far, as I actually enjoy just about every mechanic they've changed or introduced. Production of units is much cleaner and quicker, and they fit their specialized roles much better. I like what they did with airstrips and local ports, and the research/upgrade system actually adds plenty of depth without being to difficult to use effectively. An aspect of upgrading that I really like actually is that you won't wake up to find the entire enemy army being a level higher suddenly. Instead a particular type of unit in 1 stack might jump up 2 levels, but at least you can use spies or scouts to know they're upgrading. Doctrines are also a very cool part of the game, offering more depth alongside the creativity of choosing which units to use.

I want to know what people think, and if there's already a thread about this, direct me to it.