Can someone give me some idea as to what the tactility really feels like?
That is an extremely difficult thing to describe (and I'm a noob to the whole mechanical keyboard thing, too). But think of it this way: tactility is the 'feel' of the keys as they actuate. It isn't just keys, either-- think about how when you press a mouse button, it feels very distinct. When you press a mouse button, even when blindfolded, you immediately know it's been pressed because of how it feels (unless you have an old and/or crappy mouse in which case this does not apply).
Think of tactility on keyboard keys as similar, but different. It's the same phenomenon-- a kind of physical 'tell' that denotes a keypress-- just taking a different form.
On rubber domes, you have to bottom out to actuate the switch. You get a physical response when the key hits the bottom, but between when you start pushing it down and when it hits bottom there is no other resistance.
I've never typed on a buckling spring board, but they supposedly have a noticeable 'knock' to them when the switch physically buckles halfway through the stroke.
However, I own and am in love with a KBC Poker, which uses MX Browns without audible feedback. To sum up the tactility in one word I'd have to say it's an
interruption. When I push a key down, there is a point at which it suddenly feels a tiny bit different, as if I'm pushing it normally then after a jump it resumes again. It doesn't feel entirely different from the sensation of actually bottoming out, now that I think about it-- it's more like encountering some resistance along the way and brushing past it quickly without stopping.
As an experiment, try pushing a key down REALLY slowly, as slowly as you can possibly manage it. You should feel a sort of bump halfway down, and then smooth motion before hitting the bottom. You're probably just bottoming out too fast/hard/whatever, and so the sensation of the tactile response is occurring almost at the same time as the sensation of bottoming out.
