If your blog is hosted on the WordPress website, there's only so much you can do to customise the theme.
But if you have a WordPress installation hosted on your own website, at your own URL, there are few limitations on what you can achieve - it's just a case of knowing where to start.
Cheap custom WordPress themes can be hard to come by, without them simply being 'off the rack', with standardised colours and graphics.
I take a different approach - and for a fee of around £50, depending on how much work your blog needs, I can alter your current standard template, to give you your own unique colour scheme that's consistent across your homepage, static pages and posts, a hyperlinked masthead based on your own image, or an acceptable royalty-free stock photograph, and customised navigation bar, sidebar and footer links.
The standard themes that come with a WordPress installation are not really intended for anyone to use long-term as their own theme, as far as I'm concerned, but they give you a good starting point with all the necessary functionality built into it for posts, category pages, comments, and so on.
While most cheap 'custom' WordPress themes are just more off-the-peg templates, or are not really cheap at all, I can work on what you've already got to bring it in line with your brand identity, for a flat, affordable fee.
If you're interested, I'd urge you to make an initial enquiry and we can agree on what you want and need before I start any work.
As always, before having any work done on your blog theme or template, you should back up your page templates, along with your pages and posts - but when the work carried out is largely cosmetic, there shouldn't be too much to worry about.