As'salaamu alaikum sister,
I just go with a simple plain looking one. There are many styles of hijab and it can be worn in many ways. Many sisters do it the right way and many sadly don't do it the right way. Some of these hijabs are too flashy, to decorated, too big, too attention catching and flamboyant, and too camel hump among other things. When hijabs like these become an ornament itself that beautifies you rather than conceal your beauty than they are no longer islamic hijabs. A hijab is something that conceals or covers, not extenuates it. And it's a full body covering, not a scarf on the head.
Which ever style you decide to follow, inshallah here's a good reminder to all of us of what the Islamic hijab's criteria is.
1. Extent:
The first criterion is the extent of the body that should be covered. This is different for men and women. The extent of covering obligatory on the male is to cover the body at least from the navel to the knees. For women, the extent of covering obligatory is to cover the complete body except the face and the hands up to the wrist. If they wish to, they can cover even these parts of the body. Some scholars of Islam insist that the face and the hands are part of the obligatory extent of hijaab
All the remaining five criteria are the same for men and women.
2. The clothes worn should be loose and should not reveal the figure.
3. The clothes worn should not be transparent such that one can see through them.
4. The clothes worn should not be so glamorous as to attract the opposite gender.
5. The clothes worn should not resemble that of the opposite gender.
6. The clothes worn should not resemble that of the unbelievers i.e. they should not wear clothes that are specifically identities or symbols of the unbelievers? religions.
Hijaab includes conduct and behaviour among other things
Complete hijaab, besides the six criteria of clothing, also includes the moral conduct, behaviour, attitude and intention of the individual. A person only fulfilling the criteria of hijaab of the clothes is observing hijaab in a limited sense. Hijaab of the clothes should be accompanied by hijaab of the eyes, hijaab of the heart, hijaab of thought and hijaab of intention. It also includes the way a person walks, the way a person talks, the way he/she behaves, etc.