Like these things. I was given the Black and Decker version with the flexible shaft and use it a lot. Needed sanding drums recently and even though the Dremel brand is more expensive, I got those because the other options were 250-piece kits with the different grits and their own shaft. I wanted stuff that fit what I have and would be quality. Some of the reviews of the cheap stuff aren't good. That and 250 drums is way more than I need.
Also came with one of those locking shafts. I like those. Got a set of the large (for Dremel) cutting wheels with one of those quick EZ Lock attachments.
Next step up is a Foredom rotary tool, about 1/8HP and a flex shaft and different ends and tools. I pull it out when the Dremel isn't enough.
Then there is air power die grinder, done a lot of work with that one
All depends on what size work you need to do. But I would love to have a pile of Dremel accessories.
This is the Foredom, available as a stand mount, hanging mount and with foot controls and such. A bit more trouble to get out when you need it but great for larger jobs.