I am not sure if I get this whole suite thing. I have been top-level elite with one of the major hotel chains for the last three plus years running. Short of booking a room at an all-suite hotel, I think I have been upgraded to a full suite maybe once. I have gotten some very nice rooms -- balconies, ocean view, club level, jacuzzi, etc. While I appreciated the extra room, I can usually make do with a corner room or a "junior suite." I do most of my travel by myself, and when traveling with someone else, I usually request a double, as it is usually with someone with whom I do not wish to sleep. I suppose if the goal were trying to impress someone with my travel prowess (and if I ever meet the girl who IS impressed with my travel prowess...), then I might be a little more into it.
On the other hand, I have found that rather than rely on the occasional, and apparently all too infrequent suite upgrade, I usually ask for an oversized corner room. At hotels that I frequent with some regularity, I have asked that my room preference be added to my profile, and since doing that, I have had the same room on 3/4 of my visits and the same room on a different floor for the other 1/4. This does me just fine. I am certain that this also has something to do with the quality staff at the hotel who can make this happen for me, as well.
Stevekoe