Just a couple months ago, I listed character loyalty as probably the most important factor when deciding to pick up a new comic. But more recently, I've been thinking, is that a good or bad thing?
Character loyalty is good, to an extent. It maintains one's interests and makes the extended reading experience more enjoyable and engaging.
I also believe in Creator Loyalty. Some writers are just great all round - Gillen for Uncanny X-Men, JIM and Young Avengers.
Both of these are within reason, however. There have been plenty of characters I love whom have been in awful titles e.g. Genesis in WaTXM. There have been a few writers I like who've written pretty mediocre/poor series e.g Remender on Uncanny Avengers.
I have character loyalty and I think its a good thing. It keeps the characters you love in the business but I also agree with the person above. if you really hate what the creators are doing, then don't support it.
Its good, but you have to be smart about it. Some people like me can afford to pick up a few books, and so I get a combination of good books and books my favorite characters are in, and hopefully those are the same, but they aren't always. Most of my fav characters only appear in one book too so that complicates things, but not just that, but buying or not buying a book isn't a good way to let a comic company know what about that book succeeds contrary to popular belief in fact many books are set up to succeed so not buying it won't do much (Fraction and Land on Uncanny X-Men) and lets say a book does fail or get canceled, no way to tell if Marvel/DC will realize its their fault and not say blame a character/characters.
So there are more ways to be loyal to a character is what I am saying. Make noise about them, blog, recommend to writers you like, ask questions about them, try to show other fans why they might like them, and don't try and make them like a character for reasons you might. I have seen so many new characters get hate because some fans get overzealous (which isn't a good reason to hate a character) but worth bearing in mind if you want your favorite characters to do well. You want other fans to be your allies not enemies.
I say character loyalty is good, but to an extent. But if you think the writing or art are bad the best thing you can do is drop the comic, hope for a new creative team, and remember said character for when they where written well.
Case in point, this happened to me recently with Captain America. I didn't like the art or the story all that much so I decided to drop it. Now I try to get trades of Ed Bunker's Captain America whenever I can.
One of the best Cap writers ever.