I graduated last May and have been working on a telemetry unit since the beginning of June and I love it!
Depending on the type of tele floor you work on, experiences can be quite different. I work on a surgical tele floor, the patients i see are mainly S/P CABG and thoracotomies. My fiance works on a Medical tele floor, he sees EVERYTHING (and they happen to need tele, too.) *grin* So you stil get the med/surg experience, you just have something a little more technical to add to it.
As for knowing what you want to do. . . . .when I started interviewing, I wasn't completely sure. I'd only had experience w/ tele in my ICU rotation, and it was difficult for me to learn. But once it was learned, it stayed learned. *grin* I honestly had a better idea of where I *didn't* want to work than where I did. For example, I knew I would rather eat glass than work in orthopedics, rehab, or pulmonary.
Luckily, I got hired onto a completely fabulous unit, I am learning new things every day, and I work w/ great people!
As far as float. . . . .I was part of the med/surg float pool as my internship at the end of nursing school. It was a challenge, because you work with different patient populations every day. It is also interesting for that same reason. One thing that to keep in mind is that you are able to stay out of the "politics" of the different floors to a certain extent because you don't spend all your time on one single floor. On the other hand, some people miss having a "home" in the hospital. I enjoyed the weeks I spent floating. I learned a lot, and I was definitely never bored.
Hope some of this helped. It was long-winded, I know!