That's a valid point there. Of course, it's up to you!

As a personal preference, I always like to have some kind of 'universal' title trend - usually the business name. This just makes the pages feel more of a 'collective', especially when browsing the site.

In the SERP's, and again my opinion, I like it when I can identify the site straight-off from the title (rather than looking at the URL) and sometimes it will sway whether I click or not.

Regarding keyword density, well, it's a shady issue. I feel so long as you're keywords are there, especially in the title, the 'watering down' effect of additional words is negligible.