For those who rather stay in smaller and boutique type hotels that generally offer closer service to clientele, I suggest three great options whose concept are very different one from the other besides being located in different areas - which can influence a lot the whole travel experience.
Despite being a small city, Maastricht has a good range of hotels. Especially those "boutique" ones, which are supposed to have less rooms, careful service, low profile approach towards guests. There is something charming about these hotels, some of them called Bed&Breakfast. Here is a concise list where I have already stayed in that I consider worth to explore.