Along with the accessories that you wear, I think your choice of pen can say a lot about you and also be a way to express your personality. What could be more personal that your signature? What is more lasting and intimate than the words you write to another. Some people have a special pen and even ink color just for their signature.
While disposable pens are ubiquitous, aren't you worth a little bit more than that? And do you want to carry around some cheap gimmick giveaway pen with a random company logo on it? Don't your words have greater value?
Because I like to combine vintage and modern, my "special" pen is a pink fountain pen with pink ink from Levenger. And not ink cartridges, but real liquid ink. I like the ink to really flow and this pen is great. It's worth the little bit of effort to fill the pen every once in a while. Plus, I've had this same pen and original bottle of ink for a few years now. It was more of an investment than a 10 for $1 ball-point pen, but it's been a good value. Mine isn't this exact one, but it's pretty close and comes in a variety of colors. You also have a number of ink choices, so you can change it up or pick a signature color.
I actually do have a glass ink pen from when I went to Murano in Venice, but, while a cool art piece, it really is a pain and doesn't hold ink very well at all. If you can write with this for more than a letter I commend you. It doesn't have much portability either.
Your pen of choice doesn't have to be expensive either, just something that can become "your pen". I like to write with ultra fine point Sharpies too. They come in a ton of colors, feel great when you write and lay down the ink really well. They do bleed through but I guess that's the trade off.
And I've recently rediscovered an old love. My Pilot disposable fountain pen. All of the pleasure of fountain pen writing but less mess. I don't like to change out the ink in my pink fountain pen, so I use these for the more traditional colors. I get black, aqua and blue, although you can also get purple, pink and red. And they are only about $2.5o each. They hold a good amount of ink and you don't have to worry about losing them. I get them online at the Pilot pen site because I don't think they carry them at the office supply stores any more. I just love them and people do notice that I'm using a fountain pen, which they think is neat.
I got a Mont Blanc pen when I started out in business as they were a very noticeable "status" symbol. It became a part of my uniform when interviewing for a job just like a good suit and shoes. Because, and don't let anyone tell you differently, people notice the details.
You don't have to have a really expensive pen, just something that you love and have fun with. Unfortunately, I haven't found a pen that will make my handwriting any more legible.