If you want to provide some kind of feedback on or report an issue with a specific mod, blueprint, or similar, the best place is generally on the workshop page for that item; simply leave a comment and I will (hopefully) be notified and will likely respond.
Longer or General Discussions
For discussions that do not pertain to a specific item, or which are likely to involve a lot of back-and-forth replies, this is best conducted on one of the other platforms, in particular on Discord. This can be accessed from the appropriate icon in the link row in the page footer.
Please do not use email as a way of contacting me, unless you have no other options! It is much less likely to be noticed quickly and much more of a hassle to navigate.