Swap own message background and background from other messages.

[ghost]

This is just my personal preferences, but I think that own message background must be brighter than other messages background.
If I just swap two options in colors.tdesktop-theme: msgInBg and msgOutBg, than my messages stand out more and make it easy to recognize.

(on the left other people's messages, on the right - my)

Also, if you're in a group, there are a lot more other messages, so it becomes harder for eyes (almost all background is blue).