Thanks Xenon and amykhar for your replies.
The advantage of template mods and custom styles is that the users, if willing, have the ability to further tweak the layout to show a bit of their personality. Anyone with minimal knowledge in HTML/XHTML/CSS/Javascript/graphics can dip their hands and apply layout changes. That's the beauty of it. The difference in styles, however, is a matter of creative level and know-how.
I think it's great for styles to be considered - not that it should be the primary incentive for helping others - as it is part of the modification process.