Stage 1 - TTT
Stage 2 - flat stage, but slightly uphill sprint finish. It was used in the 2010 Vuelta al País Vasco - Valverde outsprinting Freire, as seen
here. Not really a hill, but a sprint that isn't flat.
Stage 3 - medium mountain stage. Pretty painfully weak for a Basque stage, but you should all be familiar with the Arrate finish now. Gaps will be fairly small.
Stage 4 - medium mountain stage. Pretty much a one-climb stage (Orduña is miles out), on a pretty easy finish. Should be a bunch all together.
Stage 5 - flattish circuit race.
Stage 6 - let's call this a hilly one. Mostly flat, but two cat.3s at the end including the uphill steep finish.
Stage 7 - flat stage.
Stage 8 - again medium mountains; a fairly straightforward run-through, with a steep final climb but only 7-8km in length. Perhaps like a slightly better Planche des Belles Filles stage.
Stage 9 - flat stage again. Slightly uphill sprint - same one as Thor Hushovd won in the 2009 Tour. However, unlike that race, the Vuelta has also placed the old Escalada de Montjuïc climb in the run-in which might elevate it to hilly as it gives breakaways a better chance.
Stage 10 - flat stage
Stage 11 - ITT (hilly)
Stage 12 - say a hilly stage? Absolutely pan flat, possible cross-winds too, before a very steep final J-Rod finish.
Stage 13 - flat stage
Stage 14 - real tough high mountain stage
Stage 15 - more or less a medium mountain stage, but with a big summit finish
Stage 16 - real tough high mountain stage
Stage 17 - medium mountains. Really a poor stage, Fuente Dé is just an uphill drag. If they wanted an uphill finish in a medium mountain stage in Cantabria, then Peña Cabarga is there (but has been used two years running), or, even better, Cueva el Soplao.
Stage 18 - flat stage
Stage 19 - flat stage, maybe a slightly tricky sprint
Stage 20 - real high mountain stage
Stage 21 - Madrid parade.