A set on 4-straight board

[MicroBob]

If he raises do you really think you should call here?

Ag-factor of 1 mean anything (yeah...it's only 35 hands)?

Seriously...is he going to raise with less than a straight??

[stigmata]

Calling river raise:

1) Opponent has shown trend to being reasonably aggressive
2) If he has any sense he will figure you don't have the straight
3) 2 pair is a distinct possibity on this board, and he could well raise with this
4) The pot is reasonably large (can't be bothered to count it)
5) You may not quite have odds to call, but who knows? When its a close decision, I would err towards calling because A)it's good for meta-game purposes, and B) I sleep better that way.