I prefer a rain fly the covers the entire tent and creates a vestibule at the door/s. The vestibule gives a dry place to keep anything dry that you may not want or have room for inside the tent like muddy boots or a pack. Both of my two person tents have two doors because I don't like crawling over a tent mate or being crawled over in the middle of the night when nature calls. I am also a big fan of symmetrical designs because it keeps everything easy to set up in the dark or rain (or both).
I have an older version of the
MSR Hubba-Hubba that I love dearly for it's space, light pack weight, and ease of setup. Since the poles are all in one piece there is nothing to misplace or forget, and the pole that runs across the top of the tent pushes the walls out for more interior volume and keeps the doorways from dripping inside the tent when open. It is a tighter fit for two, but a very spacious one person tent. This is by far my favorite tent and I still find myself using it as a benchmark for all the new tent designs that we see at trade shows and in catalogs.
The tent that I consistently lend out to friends that need a tent for the weekend is a
Kelty Gunnison 2.1 More floor space than the Hubba-Hubba but it does not use the "spreader" pole across the center so all four sides taper up to the peak. The fabrics are heavier in this tent as well, which is not a bad thing in terms of durability and completely understandable at the price difference. I think that I use this tent less frequently simply because I am less familiar with it, not because it has let me down in any way. It has certainly stood up to some pretty heavy storms without any drama.