have you come across any examples of x10 burning people's houses down or are you just downing their industrial design (or lack thereof). X10 was around long before these newer technologies and one of the reasons its so cheap is they have not upgraded to shiny and pretty.
Pretty harsh to accuse a product of property destruction because you dont like how it looks... Im willing to bet your electrical distribution box isnt very pretty either (not that you installed it, just making a point about functionality vs form)
I personally don't spend a lot of time looking at electrical connections, so the module design doesn't bother me (especially since the switches are wire in and they don't look different from any other switch), but if this is a concern, I would say just get zwave and be done. X10 doesn't attempt to be pretty, just cheap
On a side note, insteon and zwave modules are pretty looking. I just prefer to hardwire things so there are no modules and all i see are what appear to be standard electrical fixtures.