Loose fish shoves - easy call or fold?

Hey guys!
This is my first post, so please don't flame if I do not follow all of the forum rules.

Recently I've had a quite interesting hand on NL10. I was playing against a loose fish (stats), who has shoved above pot a couple of times before mentioned hand. In this situation he shoves on the river and I was not sure if I should call or fold.

Table Chittagong (Real Money)
Seat 1 is the button
Total number of players : 6/6
Seat 4: Player4 ( $2.90 USD )
Seat 6: Player6 ( $3.65 USD )
Seat 5: Player5 ( $10 USD )
Seat 3: hero ( $19.08 USD )
Seat 1: Player1 ( $19.28 USD )
Seat 2: Player2 ( $20.20 USD )
Player2 posts small blind [$0.05 USD].
hero posts big blind [$0.10 USD].
** Dealing down cards **
Dealt to hero[ 6s 7s ]
Player4 calls [$0.10 USD]
Player5 folds
Player6 calls [$0.10 USD]
Player1 calls [$0.10 USD]
Player2 raises [$0.15 USD]
hero calls [$0.10 USD]
Player4 calls [$0.10 USD]
Player6 calls [$0.10 USD]
Player1 calls [$0.10 USD]
** Dealing Flop ** [ 3c, Ks, 4s ]
Player2 bets [$0.95 USD]
hero calls [$0.95 USD]
Player4 folds
Player6 folds
Player1 folds
** Dealing Turn ** [ Js ]
Player2 bets [$3.75 USD]
Your time bank will be activated in 6 secs. If you do not want it to be used, please act now.
hero calls [$3.75 USD]
** Dealing River ** [ 5d ]
Player2 is all-In [$15.30 USD]
Your time bank will be activated in 6 secs. If you do not want it to be used, please act now.
hero will be using their time bank for this hand.

Explaination of my approach:
Preflop: 67s seemed reasonable to call 2BB on big blind, because the whole table was 'limp-oriented' except the aggro player on SB which gave me a lot of odds and potential position over the raiser
Flop: Instead of reraising, I decided to call against the aggro player with a position over him and a lot of potential in the hand and with a hope of continous aggro on his side
Turn: Flush comes in, I was preety sure about my hand, however i was anxious about river spade, so I decided to call in position with a potential room for fold on river in case a spade drops. I was thinking about reraising here, but I thought that against such aggresive player it would be way more profitable to let him tripple barell me.
River: I was not expecting such overbet here and was not sure of the call. I was placing my opponent on ace of spades, but was not sure if he had another spade here, too.

At first, I did not know how to react, but now I think that there were only a few hands which had me covered and a bluff (with ace of spades) was definitely in this aggresive player's range, so the call was reasonable.
I'm posting here, because I am not sure if at those micro stakes I should play safe and wait for more obvious situations or follow my reads and HUD from time to time.

I'm really looking forward to reading your opinions.
GL & HF!